The UMB is a 9mm, Hk Slappable, "Universal Machine Bullpistol" that utilizes a Mac-11 Bolt, Barrel, and Trunnion, Ar-15 FCG, and MPRTECH Sten Style Magaines. It's designed way thicker then it needs to be so it should be able to take a beating.
Includes STL's, STEP's, and assembly guide.
2026 SkeleTim Productions
LBRY Tags: umb; ump; bullpup; bullpistol; 9mm
Probably the single most common handgun caliber in the world.
This release either contains or is an entirely DIY fire control system.
Note: just because you can drop a CSGCG or whatever into most AR designs doesn't mean they get this tag. This means there's a DIY FCG included in the bundle.
Carbines/rifles where the action sits behind the trigger in some way. Oftentimes, the trigger you actuate will be linked mechanically to a secondary trigger/sear via a linkage.
The Cobray Company was-
Release contains models and/or source files intended for developers.
A seriously stupid simple silly straight-blowback sheet steel... 9mm PCC platform.
It's a thing that shoots a projectile out of a barrel. Also refers to just the serialized parts of those devices, where applicable.
Patrick, that's a gun.
<Yes.
Unseenkiller - PMAC Remix
Unseenkiller - Rook Blank
triangle stock/brace
MOD9
Sten Eleven
FYRE Straight Macazine
Ez Scz0rpion
Glarpion
Mega Buster
AR-9 Prof. Parabellum V1.2
