The Umarex USA Komplete NCR .22 Pellet Air Rifle uses .22 caliber lead or alloy pellets and Nitrogen cartridges. It comes with a 4x32 scope for accurate aiming at distance and has a Picatinny rail for easy mounting. M-LOK slots on the bottom of the forearm allow you to add an accessory rail, bipod or tripod. Umarex USA Komplete NCR .22 Pellet Air Rifle, 0.22 cal - Air Gun And Accessories at Academy Sports