fgc-9
the FGC-9 (or its full name: Fuck Gun Control) is an 9x19mm chambered short-barreled carbine that is not a submachine gun or a machine pistol, because it fires semi-automatic only rather selective-fire, despite having the options of equipping the gun with a longer barrel or stock.
The FGC-9 be recognized by Its upper and receiver combined to make its short profile, while the metal barrel is usually long enough to stick out, and its 3D-printed parts can be of any colors rather only black.