Description UPDATE: This pistol is 9mm. Colt Government Model MK IV Series 70 in 9mm with one, nine round removable magazine and a 5″ barrel. Smooth wood grip plates. Blued frame, serrated trigger, serrated hammer and serrated slide. Backstrap safety. Lower left side of frame serrated magazine release button. Left side of frame serrated slide release and slide stop safety. Front and rear fixed sights. Must ship to a C&R or FFL holder. Condition: Very Good with light scratches and handling wear. Clean rifled bore. Barrel Length: 5″ Serial: 70L01073 Manufacturer: Colt Year: 1971 Caliber: 9mm Model: Government Model MK IV Series 70 Book# 177