SIG Sauer MCX Rattler CO2 BB Rifle CO2 power .177 caliber (4.5mm) BBs Semi-automatic and 3-round burst modes 30-round drop free magazine Ambidextrous controls Textured pistol grip Flip-up front and rear sights Long Picatinny optics rail M-LOK handguard Minimalist folding stock Field strips like the firearm Max. velocity: 300 FPS Uses one 12-gram CO2 cartridge Weight: 4.6 lbs. (with magazine) Barrel length: 5.5" Overall length: 23.63"