WARNING Before using this firearm read these instruction carefully. This instruction manual should always accompany this firearm and be transferred with it upon change of ownership. The conversion unit consists of (1) bolt, (2) AR-15 upper with sweep eject spring, (3) magazine block and (4) magazine configuration to a new design of roller-spring magazine (5), the FXM-1, for 9mm, 40 S&W, and Simunition. We also have designed a modified Uzi magazine (6) for the .45 ACP.