Based on the classic M4 Carbine, the Hellraiser Hellboy CO2 Air Rifle looks the part and zings BBs downrange at up to 495 FPS muzzle velocity. Field-strippable HellBoy Air Rifle features full-metal construction, plus an adjustable buttstock and smooth bore barrel. Includes 18-round BB magazine. .177 caliber CO2 power plant Semi-automatic action 18-round capacity Adjustable rear sight and front sight post Removable carry handle 5.5 inch Flat Top Picatinny rail for adding tactical accessories Removable front takedown pin for easy storage 6-position adjustable stock Smooth bore barrel Safety/fire selector Magazine release Standard AR15/M4 controls Integrated swivel studs Order today!