Spin-Loc spare tank systems provide customers with the ability to fill the new Spin-Loc tanks directly from a standard quick disconnect without removal of the air tank from the gun. The lack of need to remove the air tank for recharging has allowed us to also install a pressure gauge. Can be used with compressed air or dry nitrogen gas. Now shooters can monitor how much air pressure (PSI) is left in the air cylinder during a shooting session. All this has been done without increasing the original length of the rifle, only 10.875 inches.
Fits Airforce rifles with Spin-Loc System