Patent ID: 8281698

Claim:
A bi-directional barrel interchange system for a rapid fire weapon adapted for quickly and easily removing or attaching a barrel with a receiver assembly from either the front or alternatively from the back end of the receiver housing comprising; a receiver assembly comprising a receiver housing having at least one side plate, a top plate, a bottom plate, and a back plate; said receiver housing having at least one tapered relief on at least one of the side plate, the top plate, or the bottom plate; the receiver assembly further comprising a barrel extension; said barrel extension comprising threads suited for receiving the barrel assembly; a barrel assembly comprising an attaching region comprising a first portion having threads and a second portion having at least one locking detent; a lock assembly comprising a spline, said spline being substantially mated keyway with at least one of said locking detents; said spline also being in communication with a spring mechanism said spring mechanism being in attachment with said barrel extension; removal of said barrel assembly from said receiver assembly comprising; moving the spline to a predetermined position in alignment with the tapered relief; unscrewing the barrel assembly from the barrel extension and removing from the front of the receiver housing; or in the alternative; removing the back plate from the receiver housing; removing the receiver assembly, having the barrel assembly attached, through the back of the receiver housing.