The UC submachine gun, later known as the UC-M21, is an American folding submachine gun.
The weapon was designed in the 1980s by David Boatman, likely with a similar purpose to the ARES FMG. There are known to be at least 65 fully transformable weapons, all coming in different color choices.
The weapon was designed after the ARES FMG was designed, and was derived from the ARES FMG as well; as such, both weapons are functionally identical.
- The UC-M21 is well known for starring in the 1990 movie RoboCop 2 as Hob's weapon of choice.