Created from the same robust foundation as its predecessor, the SIG MCX GEN II Air Rifle has been updated with improved accuracy and modified furniture and controls. Now featuring an M-LOK system handguard, flat blade trigger, reduced angle grip, a redesigned buttstock, and a low-profile recoil pad. Chambered in .177 pellet and complete with a rifled barrel and flip-up sights, the CO2-powered SIG MCX GEN II Air Rifle keeps you on target while delivering 30 rounds of semi-automatic firepower down range. Product Features Flip-up, dual aperture peep sights adjustable for windage and elevation. Ambidextrous manual safety levers. Quick detach buttstock houses 88g or 90g CO2 cartridges. Product Specifications Action Type: Semi-Auto SIG AIR Reflex Sight Ready: No Accessory Rail: M1913 Operating System: CO2 Sights: Folding Stock Type: Synthetic Caliber: .177 cal Optimal Pellet Weight Range: 5.0gr - 8.5gr Mags Included: (1) 30rd Pellet Mag Overall Length: 34.75 in (883 mm) Trigger Weight: 5.5 lbs Muzzle Velocity: up to 545 fps CO2 Cylinder Size: 88gr, 90gr Weight: 7.2 lbs