Sig Sauer Proforce Series M17 Blowback AirSoft PistolA - Tan Caliber: 6mm Velocity: 370 FPS 21 Round Magazine Polymer Frame Full Metal Slide Replica of the US Army M17 Pistol Optic ready slide with removable rear sight plate Field strippable with similar balance and weight as the real M17 3 dot green high visibility fixed sights Adjustable Hop-Up Picatinny Accessory Rail Full Metal Barrel Requires: 12 Gram CO2 Charge (Not Included)