HIGH QUALITY HEX JAM NUT FREE BUILT IN Precision Hex Jam Nut included with every Handgun Thread-On Compensator purchase This Guide is for Handgun Thread-On Compensators which have internal threading for your threaded barrel. All Grizzly Gunworks Handgun Thread-On Compensator styles install the same. Grizzly Gunworks Handgun Compensators come with a built in Precision Hex & Continue reading & Handgun Compensators