Sig Sauer AIRSOFT, PROFORCE 6MM PLASTIC BB, M17 COYOTE TAN, GREEN GAS POWER SOURCE The US Army's new modular handgun system is now available for the first time in an operational airsoft format developed for the training professional. - Optic Ready Slide with Removable Rear Sight Plate - Pistol Uses Both CO2 or Green Gas Magazines (Alternate Magazines Sold Separately) - Field Strippable with Similar Balance and Weight As the Real M17 - Metal Slide Construction with Full Blow-back Action - (1) 21rd Metal Magazine - Replica of the US Army M17 Pistol - Up to 320fps MODEL: M17 OPERATING SYSTEM: Green Gas (Not Included) CALIBER: 6mm Plastic BB ACCESSORY RAIL: M1913 SIGHTS: Fixed Front / Optics Ready Rear MAGS INCLUDED: (1) 21rd Metal Magazine OVERALL LENGTH: 8.5 in (216 mm) WEIGHT (OZ): 48 oz