AR-57

Discuss rifles chambered for the 5.7x28mm; P90, PS90, and AR57.
racefanaz
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AR-57

Post by racefanaz » 16 Dec 2008, 15:37

check this out

http://sgcusa.com/product_info.php?prod ... 9bf8de0275" onclick="window.open(this.href);return false;

AR Five Seven 5.7x28 AR15 Upper Conversion Kit
SGC ID: 123456010562
The AR Five Seven is an 5.7x28mm upper receiver that fits all standard AR15/M16 lowers. Using FN P90/PS90 PDW 50 round magazines, this upper allows the use of FN's 5.7x28mm cartridge in the AR15 carbine platform. Milled from one piece, hot forged, minolithic block of Aircraft Grade 7075 T6 aluminum for maximum stability, 83,000 PSI for ultimate tensile strength.

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f3rr37
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Re: AR-57

Post by f3rr37 » 16 Dec 2008, 15:39

Please do not hijack other's threads with completely new topics that should be a thread of their own.

**Topic Split**

**User banned for spamming this message**

ArtosDracon
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Re: AR-57

Post by ArtosDracon » 16 Dec 2008, 22:53

Nice to know SGC has one though, I might head up there later this week so I can finally see one in person.

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Re: AR-57

Post by Wollychop » 17 Dec 2008, 15:49

MO, could you elaborate? I've been thinking of picking one up.

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Re: AR-57

Post by majette » 17 Dec 2008, 22:20

so far no shooting problems out of mine after a couple hundred rounds:

Image

open end of the fired brass looks sort of like this:

D

one edge is flattened so it looks like a 'D'. no problems with primers or other marks on the brass. i am not reloading so it may not be a big issue. i really like the round and the rifle. with a standard ar lower i can switch uppers/calibers in seconds. and i like the length of the ar, the ps90 is too close in for me. would still like to pick one up though, along with a fiveseven. this is a great forum!

p.s. http://www.57center.com" onclick="window.open(this.href);return false; shows the uppers in stock, they can be ordered direct for 695.00

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Re: AR-57

Post by Rapier1772 » 18 Dec 2008, 17:43

ok, I admit that does look kinda cool but I wouldnt do that to a AR. Not because of any affection for the AR, but rather affection for my money - its got other plans :laugh:
majette - even if you dont reload, I would still save the brass. People here or on gunbroker will buy it. Welcome to the forum
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Re: AR-57

Post by MadDogDan » 18 Dec 2008, 19:09

My AR57 upper finally came back today with 1" taken off the front of the handguard and the barrel cut down to 10". With my suppressor mounted the overall bbl. length is 15.5" and looks great. I will take it to the range tomorrow and see how it runs. I won't be able to get pictures up on this site for a while because it is snowing quite heavilly now and will for a few weeks.

MadDog :thumb:

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f3rr37
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Re: AR-57

Post by f3rr37 » 18 Dec 2008, 19:13

You know you don't have to take pictures outside...

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Re: AR-57

Post by IDTANDY » 18 Dec 2008, 19:26

Havn't had any problems with my AR-57.

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Re: AR-57

Post by jmz5 » 18 Dec 2008, 19:51

f3rr37 wrote:You know you don't have to take pictures outside...
Yep, lets see those toes. :laugh:
كاف

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Re: AR-57

Post by MadDogDan » 19 Dec 2008, 13:02

Just got home from trying out my AR57 SBR. This thing is sweeeeet. I have numerous AR's in both 5.56 and 6.8 SPC and I can say without a doubt that this sweet shooter ranks up there with the best. It now has a 10.5" bbl. and about an inch taken off the front of the handguard. It has very little recoil to begin with but seems to have even less when run with my 5.56 suppressor on it. The overall weight isn't too bad with a suppressor and certainly no more than a comparable suppressed AR with a 10.5" bbl. I use a gutted 30 round mag as a brass catcher and just dump it when I change out PS90 mags. I ran 300 rounds through it with almost ZERO problems. Round 298 took a nose dive and didn't chamber. When I ejected the round I noticed the bullet had jamed down into the casing. I fired the two remaining rounds without incident. Not bad for it's first outing as a suppressed SBR.

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Re: AR-57

Post by ArtosDracon » 19 Dec 2008, 14:12

Have any pictures MDD? That is essentially what I would want to do if I bought one.

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Re: AR-57

Post by MadDogDan » 19 Dec 2008, 14:44

No pictures yet. It is a blizzard here and I am spending my time trying to dig my house out. I may have the time to take some tomorrow. If not they will have to wait as I am going to the islands for vacation on Sunday and will not be back until the second week of next year.

MadDog :p

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Re: AR-57

Post by ChuckD » 19 Dec 2008, 16:14

You can't tease us like that MadDog, its just not right

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Re: AR-57

Post by RC57 » 28 Dec 2008, 16:06

Any pics yet? I'm thinking that SBRing mine could be a good idea since it seems so front heavy after shooting the PS90. I haven't had a chance to run out to the BGSL recently, so I haven't fired it yet. I'm hoping that it works flawlessly like my PS90.

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Re: AR-57

Post by tejohnson » 28 Dec 2008, 16:09

I thought it felt fairly balanced compared to the 6.8 Barrett I was holding in the shop the other day. But it goes without saying, when I pick one up in the coming month, you had better believe a Form 4 will be submitted for the lower.

Come to think of it, it did not have a loaded magazine in it though.
Last edited by tejohnson on 28 Dec 2008, 17:57, edited 1 time in total.

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Re: AR-57

Post by Grantness » 28 Dec 2008, 16:12

yea, i imagine 50 rounds (especially if you are talking about the 40-45 grain variety) would add significant weight to the front. That vertical fore-grip looks like a good idea.

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Re: AR-57

Post by Medic650 » 29 Dec 2008, 21:30

I was looking at the AR57 site, http://www.57center.com/" onclick="window.open(this.href);return false;, and they are showing 10" barreled uppers and picture a 6" barreled upper. The 6" upper shows a suppressor fitting inside the forearm. I was thinking about ordering a 10" upper but I think I'll wait until I can get the 6" version. My Spectre would be great on it.

Image

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Re: AR-57

Post by tejohnson » 29 Dec 2008, 21:53

I agree ;)

I'm going with a full size, and hope I can order a separate barrel down the road. It looks like it simply screws into the receiver.

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Re: AR-57

Post by Medic650 » 30 Dec 2008, 07:36

tejohnson wrote:I agree ;)

I'm going with a full size, and hope I can order a separate barrel down the road. It looks like it simply screws into the receiver.
According to the info on the website, the barrel is torqued to 55 ft/lbs. Can't tell if anything special needs to be done for correct head space. If they are made like the 10" barreled version I saw at the Tulsa Gun Show, The barrel was milled to a hex behind the flash hider to put a wrench or socket on.

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Re: AR-57

Post by Walkalong » 11 Jan 2009, 13:12

A new AR 57 owner here. I like it a lot. I wish Alabama would let me own an SBR. An SBR AR 57 would be sweet indeed.

A serious AR? I don't know. :?: Fun? You betcha. :D

http://i183.photobucket.com/albums/x37/ ... ghtPic.jpg

The mag will come on and off with the S.P.O.T. red dot sight installed as pictured.

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Re: AR-57

Post by Rapier1772 » 11 Jan 2009, 14:29

Those do look kinda fun :evil: The single mount on the scope looks like it might not be too stable - any probs with it rocking loose on ya?
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Re: AR-57

Post by Walkalong » 11 Jan 2009, 15:47

Single mounts like that are common with that type of red dot scope. It is not a pricey one (Burris) but it is pretty solid. LaRue and others make rock solid SHTF mounts of that type.

http://stores.homestead.com/Laruetactic ... tic+Mounts

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Re: AR-57

Post by MadDogDan » 12 Jan 2009, 19:38

Medic650,

I had my bbl. cut down to 10" and 1" taken off the front of the handguard. No special head spacing is required. We just put some thread locker on the bbl. threads and used a vortex flash hider & torque wrench to torque the bbl. down to 55 ft/lbs. Not sure if I will ever be able to take the bbl. off again as only the threaded muzzle is sticking out of the handguard, but I don't see a need. I have a dedicated suppressor on it now but can switch the can out for a Vortex FH that I have.

MadDog :thumb:

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Re: AR-57

Post by jeffam » 03 Feb 2009, 12:56

I just received my upper and was going to go shoot it, until I noticed that if a round is chambered the bolt wont close all the way. I was wondering if there is something wrong or is that the way it is meant to operate?

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Re: AR-57

Post by MrSlippyFist » 03 Feb 2009, 13:03

jeffam wrote:I just received my upper and was going to go shoot it, until I noticed that if a round is chambered the bolt wont close all the way. I was wondering if there is something wrong or is that the way it is meant to operate?
Pic? Safely of course.
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Re: AR-57

Post by jeffam » 03 Feb 2009, 14:47

I'm recharging my camera they will be up in a few hours.

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Re: AR-57

Post by tejohnson » 03 Feb 2009, 15:06

I'm also kinda curious to know what round it is. Factory, reload, etc.

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Re: AR-57

Post by jeffam » 03 Feb 2009, 18:49

brand new ss197 and here is the pic Image

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Re: AR-57

Post by tejohnson » 03 Feb 2009, 20:06

Kinda hard to tell, but it almost appears that the head is not in the bolt face. Is the ejector not collapsing? Or, are my eyes failing me and the cartridge is not sliding all the way into the chamber? From what I can tell in the pic, it looks like I can see the head, or change in OD, like the head is not latched into the bolt face.

I took a look at mine, and slid a rifle-only S4 into the chamber this evening. The ID of the chamber does seem a little more large than I would like, so I would find it hard to understand why it does not chamber all the way unless the headspace is way off.

When looking over the bolt, the extractor moved fairly easily, yet the ejector failed to collapse with the pressure of my fingertip.

Have you tried to chamber multiple rounds, or just this one?

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Re: AR-57

Post by jeffam » 03 Feb 2009, 21:25

so far multiple rounds if the extractor on the bottom of the bolt moves fairly easily but the bullet seems not to be pressing the ejector in at all

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Re: AR-57

Post by tejohnson » 03 Feb 2009, 21:34

Maybe slippy will chime in since I am in the same boat as you (in a sense). I can not fully chamber a round yet due to the lack of an assembled lower. Still waiting on one of the 2 outstanding LPKs I have on the way.

I was thinking of using a tool to slowly work and oil the ejector a bit, oiling with nanolube, but I figure that I should probably wait until someone more knowledgeable chimes in. On my PS90 moving parts group, the ejector is also hard to move, but I can budge it with the tip of my index finger.

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Re: AR-57

Post by jeffam » 04 Feb 2009, 09:39

well I took the bolt out and oiled the ejector and pushed it in a couple of about 50 times now it seems to be working . Who knows maybe that part was just not lubricated enough or to tight of fit. :ponder:

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Re: AR-57

Post by MrSlippyFist » 04 Feb 2009, 09:41

So the base of a round wasn't pushing past the ejector to the bolt face?
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Re: AR-57

Post by tejohnson » 04 Feb 2009, 10:02

That's what it sounds like...

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Re: AR-57

Post by rgold1963 » 04 Feb 2009, 13:53

I started having the same problem this week. I emailed 57center and they called me about an hour later. Said they would either send out a new bolt today or i could send my entire upper into them and they would return it the next day. Very nice people and great customer service on their part. My new bolt should be here tomorrow or Friday and I will compare the ejectors when it arrives. That has to be the problem as it is VERY hard to get it to move at all and it feels like it's grinding when it does. I tried several lubes and manually pressing it over and over but it won't loosen up. I looked for a thread that I thought I saw a long time ago on some out of spec bolts early on but couldn't find it. I hope this fixes it because it's a lot of fun to shoot!

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Re: AR-57

Post by jeffam » 04 Feb 2009, 17:10

That is exactly the problem I seem to be having, I guess I will give them a call tomorrow.

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Re: AR-57

Post by MrSlippyFist » 04 Feb 2009, 17:13

Sounds like a stiff extractor. Some CLP and cycling of dummy rounds should resolve it. Wasn't somebody working on snap caps in 5.7x28?
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Re: AR-57

Post by jmz5 » 04 Feb 2009, 17:15

I think they were just squirting some kind of silicone in the primer pocket. Easy enough to do on your own without paying $5 +sh&h for two of them. :D
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Re: AR-57

Post by tejohnson » 04 Feb 2009, 17:17

Interesting. I did work on mine a little bit, and the ejector is pretty tough (not smooth like you mentioned). I used a bit of nanolube, and manually worked it with an empty case and hands within the receiver. I feel confident it should work out without issues.

What concerns me is the side of the bolt is not the most clean. You can see were the CNC machine milled out the sides, and it is probably not the most smooth surface. Do all bolts have this rough look by design, or is it just milled with a poor quality machine?

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Re: AR-57

Post by tejohnson » 04 Feb 2009, 21:32

I've loaded up a few dummies and used black glue from a glue gun in the primer pocket (yeah, heat will have an impact, but a temp solution). Gotta do something with my twice fired brass...

I'd be happy to send my twice fired brass de-primed and resized to EA if you even have a market for it.

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Re: AR-57

Post by rgold1963 » 05 Feb 2009, 14:31

Got my new bolt and just went out to test it. Works perfect! It looks different than the old one butthe extractor feels the same though.
I fired off a full mag as fast as I could pull the trigger and zero problems.
They sent a prepaid envelope to return the old bolt in so it took one day at no cost to me to have the problem solved. Pretty good service in my opinion.

Ron

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Re: AR-57

Post by f3rr37 » 05 Feb 2009, 15:20

Nice, should have taken before and after pictures to see the difference and see what might have been causing the problem.

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Re: AR-57

Post by rgold1963 » 05 Feb 2009, 15:29

I eamiled them and told them that I would like them to contact me once they receive the old bolt back and have a chance to inspect it. My first thoughts are that it was one of the original production bolts because my upper serial # ends in OO6 42. I am guessing they have made some slight changes in the design. But what do I know..... :?:

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Re: AR-57

Post by tejohnson » 05 Feb 2009, 15:41

Sounds promising. Just a quick question, if you have a PS-90, or a FiveseveN, have you noticed that there is more play in the barrel of the AR57 than those from FN? I'm not saying there is a significant amount of play, but enough to be noticeable.

My upper has a fairly low serial number (below 400), and it makes me curious to understand if there could have been any changes since.

I can get some detailed pictures up if anyone would prefer. My M&A Parts LPK arrived today, so I have the lower assembled, yet I am still waiting on the buffer tube, plate, and stock and extra LPK from my local dealer (perhaps tomorrow).

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Re: AR-57

Post by rgold1963 » 05 Feb 2009, 16:04

The "42" in my serial number is spaced from the other numbers. Does yours have 2 or 3 numbers at the end?

My ar-57 has zero "play" if I understand what you are saying. If I lock the slide back on my FsN, I can feel the barrel move a bit but I think that is normal for any semi auto handgun. The barrel on the ar-57 is torqued to 55lbs so it shouldn't be moving at all I would think.

I'll let you know what they say about the bolt after they get it back. I am guessing they won't get it until Monday or Tuesday and then they have to inspect it.

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Re: AR-57

Post by tejohnson » 05 Feb 2009, 17:18

Not the barrel itself, but the feel of a chambered round, without the bolt. The diameter of the chambering appears to be a bit bigger, so there is a bit more play with the brass in the chamber than in an FN barrel. Or better yet, if you have a calliper gauge, can you get the OD and PAL of a once fired piece of brass from your AR57?

As for the serial: API00322 (I have no issues with sharing this)

One would imagine the spacing could have been a mistake in their gcode in the various runs. Mine looks more like a single number with a wee bit of extra space between the 3 and 2.

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Re: AR-57

Post by rgold1963 » 06 Feb 2009, 06:22

I will check that out today. No caliper around here so can't help you there. I'm happy that it is working correctly and hope the weather holds out so I can shoot some this weekend. The empty brass is finally piling up and I should have a large enough collection to send out soon.

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Re: AR-57

Post by tejohnson » 06 Feb 2009, 16:28

Got the rest of what I needed for my lower today. Went out and shot 50 rounds of 197 fairly quick to roughly sight in the Eotech.

I took quite a few detailed images of brass, the upper, bolt, and lower:

http://groomlakelabs.com/index.php?q=ga ... temId=3966" onclick="window.open(this.href);return false;

While I can't say it destroys the brass, it does expand a bit more (as I assumed it would from the extra play). Although I do trim all my brass, I would certainly suggest it to anyone whom reloads brass fired from this upper.

I don't particularly like firing without some protection for the magazine well, because the brass strikes at the back of the mag well (then plays pinball the rest of the way down), impacting with the mouth of the brass. Quite a bit of scoring will occur.

The mouths of the brass took a beating, and this may be due to striking various angled edges of the mag well. I'm sure someone can design a good brass catcher from an old magazine, with a smooth tapered inside which leads to a bag perhaps. There is significant shoulder movement. Average size of the once fired brass is 1.127" long, .253 OD at the mouth, .315" OD below the shoulder, .317" OD halfway down, and .312 OD above the head. Resized with a Lee die, it is 1.134" long, .247" OD at the mouth, .312" OD below the shoulder, .314" OD halfway down, and .312" OD above the head. It is certainly making good use of the die, but no real difference in feel when resizing brass from a PS-90. (although one may assume quite a bit of brass is migrating based on the numbers above)

The bolt works like a charm, but if you look at my pictures, you may understand why I down talked the quality. The tool markings from the CNC machine are abundantly clear. The guides are not straight on the bolt, and there is an intermittent widening of the bolt half-way down (referring to the sides here).

I do not like the rough edges where the magazine makes contact with the upper. It is a PITA to seat, and the 90 degree angles were probably not the best idea on their part.

Other than my dislikes above, and continued concern over the diameter of the chambering above, it is fun to shoot!

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Re: AR-57

Post by mayadajeffery » 08 Feb 2009, 19:08

So, I am thinking about a 57 rifle. Or a .223 Rem. Or a Ruger mini 30 to add to my 7.62 collection.
Which is better? PS90 or AR57? Or AR15 M4 and another big bill for .223 ammo?
Things I'd consider... kick, accuracy, resale value, ammo in the future, reliability, parts someday, weight, portability, reliability, fun factor, cool factor, stopping power.
Stuff like that :guns:
:?:

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Re: AR-57

Post by tejohnson » 08 Feb 2009, 20:18

How about a PS-90 from Tanners (for a deal) and a stripped lower if you can find one at a sane price?

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Re: AR-57

Post by mayadajeffery » 08 Feb 2009, 21:53

MrSlippyFist wrote:Sounds like a stiff extractor.
You'd be better served by having a stiff penetrator. :thumb:

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Re: AR-57

Post by tejohnson » 12 Feb 2009, 16:18

Something else I am not too happy about. I took the birdcage flash hider off the AR-57 an placed it on my PS-90 SBR. I took the YHM Phantom and attempted to put it on the AR-57. Unfortunately, it will not seat all the way up to the shoulder. There is about a .035" gap from the back of the flash hider to the shoulder of the barrel.

Given the threading is longer than on my PS-90 SBR, it makes it a PITA to seat my SWR Spectre on all the way, although it can be done. It just requires a little cleaning of the threads inside the suppressor end cap.

Anyone else have this issue? A link to a picture on what I am describing is below:

http://groomlakelabs.com/index.php?q=ga ... temId=4050" onclick="window.open(this.href);return false;

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Re: AR-57

Post by MadDogDan » 12 Feb 2009, 17:37

Even though the Phantom does not need to be indexed they are still made to be used with crush washers that come with them. Add the washer and problem solved. Can't help you with your suppressor. My AR57 barrel worked just find with my AAC Ranger (thread on) can before I shortened the barrel. It still works fine now that it is 10.5" long.

Dog :cool:

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Re: AR-57

Post by tejohnson » 12 Feb 2009, 19:18

Eh, the Spectre is more effective on the SBR. Probably safer too. Putting it on the AR-57, although is effective, is not very practical since it adds quite a few more inches...

Phantom is back on the SBR, birdcage back on the AR57 upper. That works fine for me too ;)

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Re: AR-57

Post by Radshooter » 25 Feb 2009, 10:50

First time poster.....I just got my fiveseven upper and 500 rounds of 197 from AIM surplus.

$625.oo for the upper, $19.25 for the ammo per box. I cant wait for the weather to break a little to try it out.

What is the sight of choice for this upper????? I just have regular folding front and rear sights on it now. :ponder:

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Re: AR-57

Post by MrSlippyFist » 25 Feb 2009, 10:57

Radshooter wrote:First time poster.....I just got my fiveseven upper and 500 rounds of 197 from AIM surplus.

$625.oo for the upper, $19.25 for the ammo per box. I cant wait for the weather to break a little to try it out.

What is the sight of choice for this upper????? I just have regular folding front and rear sights on it now. :ponder:
Welcome, you should be fine with those sights. I went with YHM folders and they worked great.
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Re: AR-57

Post by Radshooter » 25 Feb 2009, 11:49

Thanks......that is what I have, YHM folders :D

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Re: AR-57

Post by Radshooter » 28 Feb 2009, 10:11

FIELD REPORT

Took my fiveseven upper out for the first time. I mated it with a Colt SBR lower. I fired 100 rounds with 0 problems using factory 197's. Wow what a fun round. I was afraid that it would seem underpowered as I shoot alot of .223 and .308 but I was very impressed. I am not sure it would be my first choice for an AR, but I have other calibers and this one is fun. I could hit leaves in the yard at 40 yards with no problem with YHM folding sights. On paper it shot very tight groups but I was only shooting 25 yards. I am really looking forward to taking it to the range to "open" it up some. I figure it is a good 150 yard gun. :thumb:

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Re: AR-57

Post by natedog » 02 Mar 2009, 10:50

I agree with MO. Why would anyone change an AR to 5.7? The .223 is superior in terminal ballistics, range and bullet selection. I would understand possibly switching uppers to a .204 for flatter trajectory or even a .450 bushmaster, 6.8 or 6.5 for better terminal ballistics yet, but 5.7? I do not understand that one. I love 5.7 in my PS90 and FsN only. I would never want to change my AR to 5.7 personally. Not griping, just questioning.

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Re: AR-57

Post by MrSlippyFist » 02 Mar 2009, 10:51

natedog wrote:I agree with MO. Why would anyone change an AR to 5.7? The .223 is superior in terminal ballistics, range and bullet selection. I would understand possibly switching uppers to a .204 for flatter trajectory or even a .450 bushmaster, 6.8 or 6.5 for better terminal ballistics yet, but 5.7? I do not understand that one. I love 5.7 in my PS90 and FsN only. I would never want to change my AR to 5.7 personally. Not griping, just questioning.
I think the main reason would be 50 rounds, cheaper than a PS90 if you already have an AR.
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Re: AR-57

Post by natedog » 02 Mar 2009, 16:28

I definitely understand the price thing. Money is too scarce for all of us. However The PS90 platform is what makes the 5.7 advantageous. Certainly not the round by itself. I guess it is just a matter of opinion, but I would not really want the round if it did not come in that nifty looking package we all love called the PS90 (or FsN as that is fun too). :D It has the advantages of a bullpup design with a good trigger for a bullpup, as well as 50 round clips while being completely ambidextrous. So that said, IMHO I do not see any advantage to converting a ballistically superior AR to the 5.7. Keep you AR in the stronger and more versatile .223 with a better trigger. And I am definitely not saying I do not love my PS90 or FsN because obviously I do. But if you are going to change the AR to a smaller round, the .204 is a much better choice for long range accuracy or tight groups.

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Re: AR-57

Post by 5Jeffro7 » 02 Mar 2009, 17:02

natedog wrote:..... as well as 50 round clips while ...
oh crap!... I see that FN has switched over to the CLIP method of holding ammunition...guess I"ll have to dump all my MAGAZINES to buy CLIPS!!!!! :wall:

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Re: AR-57

Post by tejohnson » 02 Mar 2009, 17:26

Hrm, Obama said he is going after those high capacity clips...

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Re: AR-57

Post by Esteves » 02 Mar 2009, 17:35

Did someone say clip?

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Re: AR-57

Post by natedog » 02 Mar 2009, 18:08

geez - my bad - Mags! :laugh:

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Re: AR-57

Post by MrSlippyFist » 02 Mar 2009, 19:26

Natedog-

There are places where you can't get a PS90, but can get an AR57.
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Re: AR-57

Post by tejohnson » 02 Mar 2009, 19:33

For me, it was an excuse to pass on my reluctance to get an AR, which I have resisted heavily until recently. Now I am actually considering a 5.56 upper in the not so distant future...

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Re: AR-57

Post by MrSlippyFist » 02 Mar 2009, 19:36

tejohnson wrote:Now I am actually considering a 5.56 upper in the not so distant future...
A must have.... the caliber is so common that it's a good idea.
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Re: AR-57

Post by tejohnson » 02 Mar 2009, 19:39

Guess it may give me an excuse not to toss the box of Sierra 69gr HPBT-Match. ;)

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Re: AR-57

Post by Radshooter » 06 Mar 2009, 11:08

I did it because I already have 7 other AR's and already had a lower that is legally SBR, and it is fun, and I wanted to,and I could, and it is half the price of the FN :thumb:

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Re: AR-57

Post by MadDogDan » 12 Mar 2009, 17:56

Took my suppressed SBR'd AR57 out "bunny blasting" the other day. You can't beat 50 rounds of wisper quiet, flat shootin goodness. I can tell you that just one round of SS192 is devistating at 50 yards.

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Re: AR-57

Post by Grantness » 12 Mar 2009, 18:57

I wouldnt mind having an AR57... 50 rounds w/o some big bulky drum to deal with. It ejects straight down, which is nice for us lefties who hate to get our eyes blown out if something were to malfunction. Most engagements are going to be way inside 100 yards (even though im sure with the right ammo the AR57 can be effective out to 200 or more)...and believe me, an UltraRaptor would be absolutely devastating going ~3000fps or more... The tumbling UltraRaptor projectile doesnt come in .223 (although I wonder how it would do out of a .223....the jacket would probably sheer off :?: ). Inside 200 yards I would take an Ar57 w/ 50 rounds any day over an AR w/ 20-30 rounds.

Then theres the fact that all I would need to do is buy new uppers whenever I wanted a new gun. With the PS90, all 100% of your money is sunk into that one gun...

Oh, and the AR doesnt look like some sort of space gun.. thats got to count for something. For one thing, Id be less embarrased to take an AR hog hunting than a PS90 :laugh: Although, an M1 would be even better :cool:


...so thats my .02 on the matter

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Re: AR-57

Post by stg2ahn » 12 Mar 2009, 19:53

anyone know of any match triggers that work on this upper?
If I recall correctly, the RRA 4.5lb 2stage triggers shape hindered the operation of the gun.

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Re: AR-57

Post by MadDogDan » 12 Mar 2009, 20:49

The trigger that is in my AR57 pictured above is a Chip McCormack drop-in module set at 3 lbs. I have also tried this upper on one of my lowers with a 3 lb. Timney drop-in trigger and that works 100% as well.

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Re: AR-57

Post by johngfj60 » 13 Mar 2009, 05:08

I am having an AR57 built and am anxiously awaiting it's completion.
I should have a little more than 1/2 the price of a PS90 in it and a
50 round magazine loaded with EA's finest. I think the more venues
available for the 5.7 cartridge the better. Factory ammo isn't much
higher than cheap .223 and the recoil should be noticeably less. My 2c's
worth.

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Re: AR-57

Post by jsny05 » 09 Apr 2009, 23:13

First time poster here.

I just recently built myself an AR-57. I've put about a 100 rounds down it. We've ran into a little problem here and there with it not wanting to fire a round. I'm not exactly sure if it is fully loading the round into the chamber or not. Any suggestions? :ponder:

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Re: AR-57

Post by tejohnson » 10 Apr 2009, 06:07

I think a little more information might be needed.

When firing, are the rounds chambering? Are they not ejecting?

Is it the same thing that is discussed on page 2 of this thread? It seems that it is very common for the ejectors to be a little too stiff and need a little bit of manual break-in, along with a good dose of oil. Meaning, the round is not seating all the way in the bolt face.

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Re: AR-57

Post by jsny05 » 10 Apr 2009, 13:16

They do chamber, just seems that every so often, one isnt getting fully chambered or something. a few of the blue tips on the rounds have been smashed because of it. I'll eject that round and then i can get it to fire again.

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Re: AR-57

Post by tejohnson » 10 Apr 2009, 13:59

If you have getting smashed tips, and/or setback on the projectile, then it sounds more like an extraction issue (which also causes problems with feeding). I would clean it up good, work the ejector and extractor with a little lube, and see if it persists. If it does, I would send an email to the folks at:

[email protected]

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Re: AR-57

Post by Captain Crunch » 12 Apr 2009, 21:58

That suppressed 6" upper look sweet! :drool:

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Re: AR-57

Post by jsny05 » 21 Apr 2009, 13:50

Well got some good news. Took my AR 57 out again to the range.Took the bolt out and lubed it up good with some grease (forgot the name of it) last night and It shot flawlessly today. Even got my mag catcher on too. Hacked up a AR-15 mag and it works perfect, holds all 50 rounds. :guns:

Now I just need some more ammo and mags! :laugh: That and some sights or a scope. Thinkin more of a scope than anything. I did get a Red Micro Dot sight. That works well for the most part at close range, Not so well at 75 yards. But thats all easy to fix.

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Re: AR-57

Post by gatepeddler » 23 Apr 2009, 09:27

just took my ar57 to the range today..i installed a leupold 3x9x40 rifleman w/high rings on it..
you just can get the mag out but its not an issue..just from bore sighting it in my house it was only 1 inch off at 100 yds..it kicks butt.very consistently accurate at 100 yds.

i did have 3 times in 50 rnds that it didnt chamber the round and it shoved the hole rnd in the caseing where you couldnt even see the rnd(not a mis fire)after clearing it it was fine till i rapid fired it again for another 19 rnds and did it again.

when i looked at the mag it had a small chewed up spot where it looked like the rim of the cartridge hit it when it didnt chamber..im thinking i should dremel tool the bur on the mag down a hair and it will solve the problem..

anyone else notice there mag haveing this burr on it??john

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Re: AR-57

Post by jsny05 » 23 Apr 2009, 20:42

I just looked at one of my mags, and I havent noticed any burrs on it. I had that same problem with my ar57 misloading a round or two before. That was on the first time i took it out to shoot it. Before this last time shooting it, I took the bolt out and put some grease on it to see if it would solve the problem. And havent had a problem yet with any more misloads.

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Re: AR-57

Post by gatepeddler » 24 Apr 2009, 04:15

i called thr 57center and they where very nice and helpfull people.
when i put it on the lower i did forget to change the buffer as i thought my carbine buffer would be the same..its not..the ar57 buffer is almost half the weight of the carbine buffer.
i wil try again soon and im sure this was my problem..
its a blast to shoot for sure,john

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Re: AR-57

Post by variable » 02 May 2009, 18:01

I have an OLD Colt preban lower with sear block installed. Will the 5.7 upper work with this lower or must I use a different lower?

Also can I throw it on my NFA lower and will it fire full auto?

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Re: AR-57

Post by variable » 09 May 2009, 15:30

gatepeddler wrote:i called thr 57center and they where very nice and helpfull people.
when i put it on the lower i did forget to change the buffer as i thought my carbine buffer would be the same..its not..the ar57 buffer is almost half the weight of the carbine buffer.
i wil try again soon and im sure this was my problem..
its a blast to shoot for sure,john
Don't you mean the 57 buffer is TWICE the weight of the carbine buffer?

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Re: AR-57

Post by Boo Boo » 24 May 2009, 12:24

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this is my ar57 pistol i used a friends dual mag to give it a meaner look.

its almost like owning a p90

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Re: AR-57

Post by Rapier1772 » 24 May 2009, 14:50

Looks cool but what do you use for sights? Spray & pray?
ARs are no sub for a P90! :p A PS90 is but only because I cant get the real thing. Guess I am prejudice :D
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Re: AR-57

Post by Boo Boo » 24 May 2009, 19:54

:monkey: needs a laser on the side rail.

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Re: AR-57

Post by eagleshotz » 07 Jun 2009, 08:48

Did anyone see this video discussing the ar-57. Also check out the p90!



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Re: AR-57

Post by Grantness » 07 Jun 2009, 11:23

Lame....the SS195 wouldnt light the Tannerite?

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Re: AR-57

Post by Rapier1772 » 07 Jun 2009, 12:44

Now I have to go out & try my 197s vs tannerite - gee darn
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Re: AR-57

Post by 1moreaug » 07 Jun 2009, 17:13

I apologize if I am out of line being a new guy and all but that video makes me want to hide my AR57 and not let anyone know I have one.

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Re: AR-57

Post by apache » 07 Jun 2009, 19:09

1moreaug wrote:I apologize if I am out of line being a new guy and all but that video makes me want to hide my AR57 and not let anyone know I have one.

Why would you want to hide it? Embarrassment?
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Re: AR-57

Post by unplugged » 21 Jun 2009, 13:20

Newbie to the site here, and after seeing the video, I am a little concerned about the viability of the AR57. I purchased "never been shot" one last week on a Rock River lower with collapsible stock, foregrip, Bi-Pod, Aimpoint, and Green Laser/tactical light combo. I was supposed to go to the range today to try her out, but that fizzled out. I have always loved shooting my 5.7 Pistol, and thought it was a neat way to have the best of both worlds, being able to change the Upper at will... but that video left me feeling a little empty about the rifle. Is this just more cement in the argument that the 5.7x28 round is just not sufficient?

Redpectfully submitted,

David

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Re: AR-57

Post by Rapier1772 » 21 Jun 2009, 14:02

Factory ammo is insufficient/anemic . I'd be interested in seeing how EA's ammo does comparatively. But since their suppliers can't keep up with demand, it is going to be a long wait.
Also remember - the 5.7x28mm round is not meant to be a combat rifle but rather a personal defense weapon.

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Re: AR-57

Post by unplugged » 21 Jun 2009, 14:55

Rapier,

See? That is where I get confused. The PDW thing would then not apply to the P-90, or the PS-90 for that matter. Why would the round be used in an assault rifle, if the rounds were only meant to be used in PDW platforms. It is my guess here, but the 5.7x28 round could be alot more effective IF the round was developed to its fullest potential. I suppose FN is concerned that thar early on these were knicknamed "Cop Killers", and that they might be underutilizing the potential of the round, which lends itself to the contriversary about the round itself. Don't get me wrong here, it is just that the 5.7x28 round has ALOT of potential, it is just not being realized in a public way. Why are they so affraid of developing the round to its fullest potential? I would love to carry my USG as my Duty piece, if I could get a round that would perform to its potential.

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Re: AR-57

Post by Rapier1772 » 21 Jun 2009, 19:00

How would the PDW thing not apply to the P90/PS90?
That is exactly what the P90 is. It was made for people who could not carry a full size battle rifle in performance of their duties but still needed to be armed. Vehicle/tank drivers, support personnel, even our own Wollychop (a Blackhawk pilot) knows the problems of carrying full size battle rifles. The PDWs are smaller/lighter and are less of an hassle for a person to use when their main duty is not frontline fighting.
The military/LEO rounds from FN are better than the ammo they give us civies. But those are not available to everyone due to the armor piercing capabilities. FN has had to underpower the ammo we Joe Citizens get in order to appease the brady bunch & make ammo available to the general public. In order to be sold to us the ammo has to pass some fed pentration standard. You're right, this round does have a lot of potential and EA has made great strides in finding it. They are always testing & looking for ways to improve. Most of their ammo exceeds anything FN has to offer.
unplugged wrote: I would love to carry my USG as my Duty piece, if I could get a round that would perform to its potential.
Duty piece? That mean you are military/LEO? If so, EA has something special just for you :D
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Re: AR-57

Post by panzermk2 » 21 Jun 2009, 20:15

Also keep in mind the AR57 concept included an SOP of using subsonic ammo and a suppressor. You carry the upper ready to go and when you need to remove a sentry you swap off your standard M4 upper and swap this one on. Keeping in mind the SS 5.56 turns the M4 into a single shot most times and you have to cycle the action your self. The SS 5.7x28 will cycle every time.
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