Crosman Air Mag C11 airsoft BB gun CO2 Up to 100 shots per 12-gram CO2 cartridge 15-rd removable mag Fixed front & rear sights Weaver accessory rail under barrel Grip cover slides back to load/unload CO2 cartridge No blowback or Hop-Up We chronyed with .12g BBs (400 fps) & .20g BBs (360 fps) Best accuracy with .20g BBs