KWC Sig Sauer SP2022 CO2 Style Metal BB Pistol Type: BB air pistol. Manufacturer: Cybergun. Model: Sig Sauer SP2022. Materials: Metal and polymer build. Weight: 1.7 pounds. Barrel: 4 inches, brass, non-rifled. Propulsion: CO2 x1. Action: Semi auto non-blowback, double action only. Ammunition Type: Steel BBs 4.5mm. Ammunition Capacity: 23 rounds FPS: 700++