Our New Retay S20 Blank Gun has beautifully detailed design and is built with exemplary construction to insure proficient operation. Details; Caliber: 9 mm P.A.K, Magazine Capacity: 17+1 in the chamber, Safety: Firing Pen Safety, Length: 7.4", Height: 5.86", Weight: 2.03 lbs, Trigger Mechanism: Double action, System: Semi automatic