The Scorpion EVO 3 S1 is the civilian pistol-configuration version of the CZ Scorpion EVO 3 submachine gun, legally classified as a pistol due to absence of a buttstock. The EVO 3 action uses a simple blowback mechanism and ergonomic pistol grip adapted from the SMG. One of the most popular brace-equipped pistol platforms in the US market due to its reliable action and affordable price. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 20 Year introduced: 2015, Czech Republic Weight: 5 oz Overall length: 16.2" Status: Active Military use: Yes Intended use: law_enforcement, competition, range, collector