VOLUNTEER ARMS COMMANDO MARK III, BLACK (MATTE), SEMI-AUTOMATIC, 45 ACP (45 AUTO), 16 Notes: Caliber: .45 ACPAction: Straight blowback, semi-automaticBarrel Length: 16 inches to 16.5 inches (some variants styled with faux finning and compensators)Overall Weight: Approx. 7 to 8 lbs (significantly lighter than an original Thompson) Capacity: 30-round box magazines (Mark III typically used M3 Grease Gun magazines; Receiver: Steel tubing with the charging handle positioned on the left sideFurniture: Wood stock (fixed or detachable depending on the Mark variant) with plastic/polymer pistol grip and foregrip