PISTOL: PSA - PALMETTO STATE ARMORY MODEL 5.7 ROCK, SERIAL NUMBER RK033750, SEMI - AUTOMATIC, 5.7X28MM, BLACK (MATTE), CASE NOT INCLUDED, 5 Notes: Palmetto State Armory 5.7 Rock Pistol The Palmetto State Armory 5.7 Rock is a semi-automatic pistol chambered in 5.7x28mm. This example features a black matte finish and a 5-inch barrel. The firearm is offered without a case. Specifications: Manufacturer: Palmetto State Armory (PSA) Model: 5.7 Rock Action: Semi-Automatic Caliber: 5.7x28mm Finish: Black (Matte) Barrel Length: 5" Serial Number: RK033750 Case: Not Included