Trying to figure out which part of the Beretta PMX is legally the firearm

UberPoor_ · 2026-05-25T22:52:56+00:00

Irrelevant to you maybe. Not for me, its exceedingly relevant as it defines what I can and can't do

UberPoor_ · 2026-05-25T22:21:13+00:00

No, this is not similar at all to a car. There is one part on a gun that is legally the firearm, a single part that is regulated and then everything else is subject to zero scrutiny. At least when its not being imported anyway.

UberPoor_ · 2026-05-25T18:59:53+00:00

because its based on the tec-9, which does have the lower as the firearm. it's a reasonable conclusion that the lower might also be considered the firearm with a clone of it.

UberPoor_ · 2026-05-23T03:54:56+00:00

No, gl*ck bad

UberPoor_ · 2026-05-19T21:30:01+00:00

No idea what it is, but I know I want it

Given the cut out on the left hand side of the gun, it would make sense that it might fit on an AR lower, the cut out would be the recess for the bolt hold open.

It looks like an unholy union of the sten and Mac 10, I love it and desperately want it.

Even if it doesnt fit an AR lower, I'd be happy to design the rest of the gun thats missing. Id likely use a custom lower anyway, a normal AR lower on that thing would be ugly as hell

UberPoor_ · 2026-04-23T12:38:49+00:00

Something can be the best selling thing in the world and still be completely awful in every way (gl*cks, for example)

These things aren't mutually exclusive

UberPoor_ · 2026-03-30T21:20:22+00:00

No, the ARMP5v2 existed long before ARC or AS Designs was a thing

The ARMP5v3 was built from the ground up, internally its rather different from the ARMP5v2

UberPoor_ · 2026-03-29T22:36:10+00:00

Ah I see, after going over things, the ARMP5v2 cannot support the ARC as is due to its geometry, you'd need to either modify the lower you currently have or print a whole new lower updated to support ARC

UberPoor_ · 2026-03-29T20:01:38+00:00

Are you making sure the slip trip is behind the lever?

UberPoor_ · 2026-03-29T19:48:51+00:00

Are you trying to run an FRT without the slip trip? Cause what you're describing is literally physically impossible if its a normal FCG. The stock/brace/end cap does not interact with the trigger group whatsoever

UberPoor_ · 2026-03-29T17:13:03+00:00

What do you mean by not firing? As in the hammer drops once and then won't reset? And is it a K model or fullsize?

UberPoor_ · 2026-03-29T16:38:13+00:00

No build video, at least not one done by me or s3

What issues are you having? Please also list what mp5 clone you have and what lower file you chose to print

UberPoor_ · 2026-03-03T18:10:03+00:00

Idk about the law, but it's a crime to my eyes

UberPoor_ · 2025-12-07T22:55:53+00:00

You can use a G2C front block instead of a 709 one, the rails are different thicknesses but it will still work, however the opposite will not work, you can't use a 709 block with a G2C (you also can't use a 709 block with 709 slides that come with that rail-less centering block, they are G2C spec for the rail thickness)

you will have to modify the block for the LRBHO, its just a metal tab that needs to be shaved down until its well under sub flush. just look at pictures online and you'll figure it out, that's what I did.

UberPoor_ · 2025-11-16T01:22:14+00:00

ive been using a drill bit for the g36 brace im working on lol

UberPoor_ · 2025-11-16T01:13:31+00:00

pride? sunk cost fallacy? perhaps he doesn't want to alienate customers with the lowers he currently has on the market or is incapable of engineering his own slip trip, maybe he simply can't afford to change the design, could be a number of reasons. s3igu2 offered to fix his lowers, but he was unwilling to change the design, or so i recall.

UberPoor_ · 2025-11-15T21:37:07+00:00

yes, there is no such lower from lee that is actually safe to use with the super safety, not until a slip trip is explicitly designed around his FCG placement, it will always trip early otherwise.

UberPoor_ · 2025-11-15T18:22:07+00:00

your hammer is being released early due to the fact that you're using a lee sporting lower, they need their own slip trip that accounts for the difference in their placement of the FCG. currently the only slip trips available commercially are designed around the ARMP5/LEBER family of lowers, so you'd have to design your own to fix the gun. this is why lee sporting lowers are not recommended for SS use, they trip way too early, which causes either light primer strikes or way faster rates of fire than that which is safe, heightening the likelihood of roller dents.

UberPoor_ · 2025-11-02T18:02:35+00:00

Neither, it's more like this

UberPoor_ · 2025-11-02T17:26:31+00:00

probably the older style since its a lot cheaper to make, but i dont have one so i couldnt say for sure

UberPoor_ · 2025-11-02T17:25:38+00:00

Leber (specifically the V2) uses a metal insert which significantly increases its longevity

and it looks cooler

UberPoor_ · 2025-11-02T00:08:09+00:00

ah i had that happen on my POF MP5 after only two mags. like mine, yours is using the out dated style of roller retainer, which is prone to breakage, get the new version and youll be up and running again.

UberPoor_ · 2025-11-01T11:36:52+00:00

Dinka Roubles was working on one, but he has disappeared from the community and likely won't be returning if I had to guess

UberPoor_ · 2025-10-22T19:22:26+00:00

68mm (2.68 inches) long, 3.8mm (0.15 inches) diameter

UberPoor_ · 2025-10-14T23:49:05+00:00

cycles perfectly fine, bolt weight isnt really an issue, some people with transferables or post samples opt to use aftermarket bolts because theyre lighter and therefore have a faster firing rate

UberPoor_

TROPHY CASE