Sig Sauer MCX Rattler .177 Steel BB CO2 Air Rifle Black The Sig Sauer MCX Rattler is a CO2 BB rifle with the look and feel of the MCX Rattler SBR. It is available now at BattleHawk Armory. Velocities up to 300 fps 30-round drop-free magazine Safe, semi-auto and 3-round burst selector Fires .177 steel BBs Shop more air guns, ammo and CO2 at BattleHawk Armory. Not sure it fits your setup? The BattleHawk Armory team is happy to help you check before you buy. Specifications Manufacturer: Sig Sauer Model: MCX Rattler Action: Fully/Semi Auto Caliber: 177 BB Capacity: 30rd Barrel Length: 5.5 Sights: Flip Up Front & Rear Weight: 4.6 lbs MFR Part Number: AIR-RATTLER-BB UPC: 798681604234 Order the Sig Sauer MCX Rattler today from BattleHawk Armory.