this post was submitted on 12 Oct 2025
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The Ark

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Re-upload of r/fosscad from 2015 - June 2025.

Warning: Links might be broken, images missing, etc.

Thanks to @hogleg@forum.guncadindex.com for providing the Reddit archives!

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Originally posted by u/Print-a-22 at 2024-11-14T17:55:09Z

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This thing is a ton of fun. Definitely make sure you file your extractor groove before gluing your liner into the barrel, as it's really difficult to do well once it's glued in. I'll be reprinting a barrel to follow my own advice. Speaking of best practices, if you use the threaded barrel, print at an angle. I printed vertical and my can was too heavy and broke the plastic threads off, hence the exposed liner at the tip.

If you'd like to build one, hardware kits are available at my username dot com, and ready to ship including all laser cut parts. Kits are BYOBarrel, so you either need an RS22, or any length chambered barrel liner.


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[–] noah@fosscad.io 1 points 1 month ago (2 children)

u/nochilljosh · 2024-11-15 01:04:39 UTC · score 2

Would epoxying on a break muzzle device or a thread adapter eliminate that issue with weak threads?

[–] noah@fosscad.io 1 points 1 month ago

u/Print-a-22 · 2024-11-15 01:09:03 UTC · score 2

It could help..Kaewon also noted in guide to make sure to get a lot of jb weld under the threads and I didn't do that. Will follow directions better on attempt 2

[–] noah@fosscad.io 1 points 1 month ago (1 children)

u/kaewon · 2024-11-15 04:25:04 UTC · score 2

Possibly depending on how it's done. The issue he experienced was bad attachment to the liner. Rough of the liner surface and make sure there is enough epoxy should work for most devices. I haven't had issues with my kvp modular comp ez can. If you can maximize surface area of the liner attached to the muzzle device, it would require more force to remove. With threads, that means more threads which isn't really possible for most muzzle devices. Or use a muzzle device that attaches onto more liner length.

Another alternative that is used on other designs is a thicker barrel sleeve so the printed part alone has the strength to hold 22, which doesn't require much, rather than relying on the epoxy. Others have done this along with a metal adapter to have metal threads.

Anyone who has printed small threads know they are kinda terrible. It's best to screw whatever on and just leave it. It's one of the reasons I made QD for ez cans so you can just attach a brake and leave the threads alone.

[–] noah@fosscad.io 1 points 1 month ago

u/Somebodysomeone_926 · 2024-11-16 07:18:38 UTC · score 1

Barrel extension for a 9mm should slip over it and is already threaded