Caliber: 45ACP – Operating System: Closed Bolt Delayed-blowback – Overall Length: 16.75 in – Overall Height: 6.8 in – Barrel Length: 5.5 in – Weight (Unloaded): 5.9 lbs – Threaded Pitch: M16x1 LH – Magazine: G21 13rds / KRISS MagEx 25 rds