The Dan Wesson 2.5" Silver CO2 4.5mm BB Gun Pistol is the shortest of the Dan Wesson line of revolvers. With a full metal construction and sleek silver finish, the Dan Wesson 2.5" Silver CO2 4.5mm BB Gun Pistol looks and feels like the real thing. It runs off of a single 12 gram CO2 cartridge located in the grip, which can be changed in seconds on the field. Loading your Dan Wesson BB Gun Pistol is the best part. BBs are loaded into realistic bullet shells, and then you can either chamber them one by one, or use the included speed loader to load all 6 bullets at once!