The WinGun 4" Co2 Gas Revolver (Black) is a very realistic and powerful gun. These have the wood style grips. The CO2 cartridge rests in the grip of the revolver, so there is very little distance for the gas to travel from the cartridge to the BB. The WinGun line of revolvers is very powerful and as you move to the longer barrels you get more FPS. This revolver does utilize 6 realistic looking shells that hold 1 BB each. This is a must have for any revolver fans!