Spin-Loc Hi-Flo air tank Connects to AirForce Condor rifles without having to remove the tank from the gun Built-in manometer (air pressure gauge) Uses standard quick-disconnect fittings Can be used only with compressed air or dry nitrogen gas Does not fit older models of guns unless they have been retrofitted* to accept the new tank Does not fit .177 or .20-caliber guns. Use ONLY for .22- and .25-caliber Condors. The Spin-Loc air tank makes it much easier for you to refill your tank since you won't have to remove it from your gun. Plus, switching to commonly used quick-disconnect fittings simplifies the whole process. The onboard pressure gauge lets you monitor how much air is left in the tank. No more guessing! *To retrofit your gun to accept the Spin-Loc standard tank, send it to AirForce Airguns.