The Submachine Gun is a weapon found in Condemned: Criminal Origins and is first found in the library. It does the same damage as .45 Cal Pistol but is fully automatic and holds 20 rounds. It also has poor accuracy, though that can be compensated by burst firing. The submachine gun appears to be based off the M3 Submachine Gun, also known as a "Grease Gun." In Condemned 2: Bloodshot, this weapon is replaced by the subgun.
In-game model.