New Custom Slide Cover (Plastic with front slide serrations)

Discuss the FN Five-seveN line of pistols and accessories.

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by panzermk2 » 08 Jan 2013, 21:00

I do mean when a primer lets got or one gases. That gas has one place to go and it's out the loaded chamber indicator. This is why during accurizing I cut a channel along the axis of the thick section of the chamber indicator to reduce the resistance to the gas and provide even better venting.
I know what your thinking the gas would bleed out the empty indicator hole in the slide and then fan out between the exterior of the metal slide and cover without a whole. It would if it wasn't a high pressure jet. If the jet is strong enough to shoot the indicator out through the cover with the spring. What resistance would just the cover provide to it?
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 08 Jan 2013, 21:15

I can see the potential problem...that's why I said excluding a blown primer etc., as I was considering normal operating conditions. I guess that's one reason FN warns against using reloaded ammunition, as I'm sure a high powered load is more likely to suffer this event. At any rate, I am definitely including the loaded chamber indicator, and this material appears to be quite a bit more flexible and possibly less likely to suffer a brittle failure from a shot of gas.

Thanks for the explanation :thumb:

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by fooschnickens » 09 Jan 2013, 07:59

If the chamber pressures in the FsN weren't nearly double all other pistol calibers, then maybe :laugh: Plus, there is a cutout about the size of a coffee bean in the slide itself (not the cover) where you can clearly see the indicator pin which is directly opposite the ejection port. As soon as the gases try to escape out the ejection port, they're gonna go for the chamber indicator next.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by panzermk2 » 10 Jan 2013, 01:06

fooschnickens wrote:If the chamber pressures in the FsN weren't nearly double all other pistol calibers, then maybe :laugh: Plus, there is a cutout about the size of a coffee bean in the slide itself (not the cover) where you can clearly see the indicator pin which is directly opposite the ejection port. As soon as the gases try to escape out the ejection port, they're gonna go for the chamber indicator next.

Wrong they go for the indicator first. When the primers gas the shoulder of the case has not started to move and the brass is fulling the in the chamber. The pressure has three places to go.

1) Chamber indicator when there is a round in place the bore for it is open making it a path of least resistance.
2) Firing pin channel, this is why even with just SS197 you have to make sure the channel is clean
3) Extractor but it pretty well seals up against the case head and does not have much of a gap. It does see some pressure hence
the few that have failed from the factory.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by Mister Freeze » 17 Jan 2013, 09:54

Did FN beat you to it?

viewtopic.php?f=15&t=14110" onclick="window.open(this.href);return false;

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by jgreenberg01 » 17 Jan 2013, 10:09

Mister Freeze wrote:Did FN beat you to it?

viewtopic.php?f=15&t=14110" onclick="window.open(this.href);return false;
That's the first thing I thought too when I saw the pic.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by Rapier1772 » 17 Jan 2013, 10:47

ditto
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by panzermk2 » 17 Jan 2013, 11:08

They also have the ridge running forward also.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 17 Jan 2013, 14:17

Well, I was afraid this might happen when news of a 'new' FsN first popped up. I'd like to see some better pictures of theirs. I may be biased (okay, I am) but I still like mine better...and I bet FN won't put custom text on it for you :laugh:

I'd like to think I beat them to it since I showed mine first!

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by Mister Freeze » 17 Jan 2013, 14:26

Possible infringement?$?$

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 17 Jan 2013, 14:57

No, I don't think so. Even if it was, patent litigation between giant corporations and individuals typically goes nowhere.

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by panzermk2 » 17 Jan 2013, 15:51

s-industries wrote:Well, I was afraid this might happen when news of a 'new' FsN first popped up. I'd like to see some better pictures of theirs. I may be biased (okay, I am) but I still like mine better...and I bet FN won't put custom text on it for you :laugh:

I'd like to think I beat them to it since I showed mine first!

You still have a crap load of FsN pistols out there. Their owners will still need or want different covers, Lord knows when we will see these. Also these new one may or may not retro fit.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by fntech1 » 17 Jan 2013, 15:54

I am with panzermk2. Just compete, it's all American!

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 17 Jan 2013, 18:29

Oh yeah I'm moving forward with the covers just as planned.

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by blueorison » 18 Jan 2013, 00:44

fntech1 wrote:I am with panzermk2. Just compete, it's all American!
YESSS 'MURICA!!!! God bless the individuals like you who take a proactive approach to life. I have much to learn from you, sir.
s-industries wrote:Oh yeah I'm moving forward with the covers just as planned.
:thumb:
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 20 Jan 2013, 17:10

Did some material testing today. I exposed a test piece to Hoppe's Elite Gun Cleaner, Break Free, Outers Gun Oil, Rem Oil, Wal Mart brand carb cleaner, and Rx 454 Spray Penetrant (this has shown to be fairly aggressive in the past). None of them seem to have any affect on the material, although the oil did seep quite a bit, distributing itself much beyond the original application area. I believe this is a result of the somewhat porous nature of 3D printed parts. This was an unfinished part, so these chemicals may or may not have an effect on coatings.

Also did a heat test to see how this would react to being post cured after cerekoting, etc. I let it heat up and soak at 300 F for about 20 minutes with no negative effects. Yes, the material did get pretty flexible, but not enough to deform without external input. After cool down it seemed like it pretty much went back to it's original state and appears to be dimensionally stable.

Finally, I sanded proto #1 for a few minutes with 180 grit emery paper and painted it with super cheap black paint my wife had for some crafts project. Not sure how the paint will hold up, but the surface finish was definitely improved. I worked for less than 10 minutes, but I think putting in a solid half hour (possibly with 120 grit to cut a little faster) would result in a very nice finish.

I'm happy with the results so far. Ammo is too scarce to do a bunch of real life testing, but hopefully soon I can rig up a test stand to see how well this thing takes repeated impacts.

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by Rapier1772 » 20 Jan 2013, 17:22

Sounds like your cover may have an advantage over the original for chemical resistance.
What is the "printing temp" of that stuff? I doubt I'll ever get my gun that hot but just curious.
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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by s-industries » 20 Jan 2013, 19:17

I think I remember reading that the melting point was around 350 F, so the "printing temp" would be right around there.

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Re: New Custom Slide Cover (Plastic with front slide serrati

Post by CDeel » 20 Jan 2013, 20:29

You mean I can't put it in the oven with my pizza? What a ripoff!

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Re: New Slide Cover (Plastic)

Post by MrSlippyFist » 26 Apr 2013, 19:41

Onejzsupra wrote:
srt-4_jon wrote:Why not just find someone with a 3d printer? They are cheap in comparison. I know of quite a few locals that have them.

You have to be careful with those, a guy had a blog where he planned on make a gun with one. As soon as the company found out they cancelled his contract and sent people to take all of the equipment that day.

I know a place that will 3D print your gun parts.

I took this pic 5 hours ago.

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