There's nothing like an extra reservoir for air to keep the shooting fun going! Air tank includes metal buttplate. Up to 15 shots at full power. 30 - 40 shots at low power settings. Licensfree valve-10J ,export orders there its legal FAC valve Use only with the AirForce Condor in .20, .22 or .25 caliber. Not recommended for .177 cal. Condors.