Abstract: An adaptor is provided between a hopper of a paint ball gun and the gun itself so as to effectuate a stable and secure but removable connection that does not deteriorate with successive disconnections and reconnections A compressible bushing is acted upon by a nut so as to radially compress the bushing and form a tight fit against a tube extending from the hopper. The nut is threaded onto a tube that is threadingly connected to the gun.