Radian Weapons RAMJET Barrel, AFTERBURNER Compensator, 9MM, DLC Finish, Bronze and Black, INTRA-LOK Mounting System, Fits Glock 19 Gen4 R0834 The Radian AFTERBURNER plus RAMJET combo provide unprecedented recoil reduction and match grade accuracy in a concealed carry package. The threadless barrel design allows for effortless install/removal for cleaning. INTRA-LOK allows the user to simply slide the compensator over the barrel" insert and tighten the locking screw" making for a simple and repeatable installation process. This system allows the user to easily remove the barrel from the slide for cleaning.