AR57 bolt face denting barrel

Discuss rifles chambered for the 5.7x28mm; P90, PS90, and AR57.
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Re: AR57 bolt face denting barrel

Post by panzermk2 » 07 Jan 2015, 21:15

If those compressed cases had fired you would have had a shrapnel grenade go off inches from your face.
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scottl1346
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Re: AR57 bolt face denting barrel

Post by scottl1346 » 09 Jan 2015, 17:35

i received another replacement upper today and unfortunately its doing the something to the brass so i sent an email and asked for a refund but i don't know how that's going to go sense i bought it through lone wolf dist. if i was all of you id check your brass im willing to bet all the uppers do it sense the bolt has no way of stopping its relying on the soft piece of brass to stop it. the brass on these uppers is getting push to far into the chamber re shaping/sizing it.

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Re: AR57 bolt face denting barrel

Post by Weshowe » 30 Jan 2015, 11:47

Gents,

From the looks of the brass I'd say the upper was short chambered...due to the shoulder pushed back the way it is...

Definitely NOT kosher...

You could clean it up and see if it continues to do the same thing...

Wes

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Re: AR57 bolt face denting barrel

Post by scottl1346 » 30 Jan 2015, 21:43

Yeah still having issues I cleaned everything up as soon as I recieved it. I still have gotten no response from the office about a refund its been 2 months sense all this started. Today I decided to send a email to the tech I was dealing with to see what he had to say. I'm very disappointed with this company and lack of CS which was good in the beginning. If your looking at a 57 upper save your money build something worth 700 bucks or drop a 22 conversion into your 556. BBB might be the next step if I don't get any response.

scottl1346
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Re: AR57 bolt face denting barrel

Post by scottl1346 » 04 Mar 2015, 00:50

still no fix or refund asked for a refund and never received a email back from tammy at 57 center.

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grimmond
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Re: AR57 bolt face denting barrel

Post by grimmond » 04 Mar 2015, 12:37

Your brass is being compressed because you are trying to force the bolt to meet the face of the chamber. They were not designed to operate flush like a normal rifle. If Jeff tested it then it works fine.
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scottl1346
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Re: AR57 bolt face denting barrel

Post by scottl1346 » 04 Mar 2015, 14:34

No not trying to compress the cases it does it even under its own power

Mister Freeze
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Re: AR57 bolt face denting barrel

Post by Mister Freeze » 04 Mar 2015, 16:29

Generation 1 or 2 upper? I'd guess Gen 2. My Gen 1 seems just fine. I can't even see how the bolt would mark the barrel face that way, even if the bolt was in upside down. No compressed cases here.

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Re: AR57 bolt face denting barrel

Post by scottl1346 » 04 Mar 2015, 16:54

gen 2 and the issue with the bolt is it wasn't completely flat the indents where high spots around the bolt face. the compressed case issue is another problem idk why its doing it iv checked everything. pretty sure its a chamber issue as they had a bunch of bad ones awhile ago they do not cut there barrels they only "glue" them in place according to jeff when we last spoke.

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Re: AR57 bolt face denting barrel

Post by Mister Freeze » 04 Mar 2015, 17:12

Glued barrels? I recently was in contact with Jeff when my barrel came loose while removing the muzzle device. I was concerned about head spacing, but he said as long as the bolt closed against the barrel and not the receiver, I was ok. 50 ft/lbs and red Loctite.

You shouldn't have to, but milling the bolt face flat should be easy enough. But a bad cut on the chamber? Way not cool.

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Re: AR57 bolt face denting barrel

Post by scottl1346 » 04 Mar 2015, 17:36

milling the bolt face would be easy but it had already done damage to the barrel face, it shouldn't have ever left the shop that way IMO. QC is poor IMO he said they put 1 bullet down range to function test and that's it as long as it goes bang and not boom it goes out the door. yeah he said glue but meant loctite im sure. they got a little happy with the loctite on one upper i had received PITA to clean up

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Re: AR57 bolt face denting barrel

Post by Wadster » 27 Aug 2015, 09:24

scottl1346 wrote:milling the bolt face would be easy but it had already done damage to the barrel face, it shouldn't have ever left the shop that way IMO. QC is poor IMO he said they put 1 bullet down range to function test and that's it as long as it goes bang and not boom it goes out the door. yeah he said glue but meant loctite im sure. they got a little happy with the loctite on one upper i had received PITA to clean up
Hello,

Has this issue ever been resolved??

I have just received a GEN-2 AR-57 upper via Lone Wolf but had trouble installing it. Similar to the picture above, my barrel extends into the receiver. The result is that it pushes the bolt back beyond the end of the upper receiver by about 1/8th inches and prevents it from closing down on the lower receiver.

The assembly arrived with the both the barrel and muzzle device only hand tightened. My initial thought was that there must be some kind of barrel shim or lock washer missing which would lock the barrel at the correct depth. Can anyone advise?

Thank you

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Re: AR57 bolt face denting barrel

Post by Mister Freeze » 27 Aug 2015, 15:05

My barrel came out when trying to remove the muzzle device. On inquiry, I was assured there was no headspacing necessary. I torqued it down and it runs fine. It protrudes thru the upper as much as 1/16".

scottl1346
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Re: AR57 bolt face denting barrel

Post by scottl1346 » 27 Aug 2015, 15:14

My issue was never resolved they stopped responding to my emails after the last batch of pictures I sent them of my compressed cases and told them there out of spec chambers could seriously hurt someone. Try giving them a call/email.

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Re: AR57 bolt face denting barrel

Post by Wadster » 27 Aug 2015, 18:11

Mister Freeze wrote:My barrel came out when trying to remove the muzzle device. On inquiry, I was assured there was no headspacing necessary. I torqued it down and it runs fine. It protrudes thru the upper as much as 1/16".
I emailed AR57.com and got an answer from Dennis who said that:
  • 1. The barrel is supposed to protrude into the receiver as pictured.
  • 2. The barrel should be tightened to 60 ft. lbs. and no further headspacing is necessary.
But I can't close the the receiver with the bolt sticking out as much as it does. I tried this with a few Bushmaster and Rock River lowers without success. Below are pictures of how much it sticks out and the fitment with the lower receiver:

Image

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scottl1346
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Re: AR57 bolt face denting barrel

Post by scottl1346 » 27 Aug 2015, 18:43

somethings wrong with that upper i just looked at my POS and it sticks out very little.

Mister Freeze
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Re: AR57 bolt face denting barrel

Post by Mister Freeze » 28 Aug 2015, 03:15

Here's mine

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Wadster
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Re: AR57 bolt face denting barrel

Post by Wadster » 28 Aug 2015, 09:59

Can I ask you guys to measure the length of your AR57 bolts?

Mine appears to be just over 6.75" in length.

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Mister Freeze
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Re: AR57 bolt face denting barrel

Post by Mister Freeze » 28 Aug 2015, 18:52

Yes, my bolt is 6.75" long.
My chamber at the receiver, then with the bolt closed

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