The Official Qube(TM) compensator is the first pistol compensator that doesn't require set screws. The compensator mount threads onto the barrel first and gets torqued down with a wrench. The Official Qube(TM) compensator body slides over the top of the compensator mount and shoulders against a taper. The lock nut threads onto the compensator mount and pinches the Official Qube(TM) compensator body against a second taper and locks it down which prevents rotation.

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