HK 3 Lug Installation Tool

thingiverse

Got stuck with communist 13.5mm LH threads on your 3-lug muzzle device that make interfacing with American 1/2"x28 (RH) threads a perpetual tightening struggle? No problem! Use this to tighten your 13.5 LH threads down with a 7/8" (22.23 mm) wrench so you don't loosen it when trying to tighten the 1/2x28 (RH) threads on something else. I searched the internet for something like this, but nice Griffin Armament 13.5xLH ones were out of stock everywhere. I really wanted to suppress my MPX, so I ordered this one from HKParts and they claim it'll work on the MPX. It was cheaper too. Checked bore concentricity, and now that I have this tool so doesn't come off when trying to retighten the 3-lug assembly, I think it'll work just fine. Edit: There is actually a metal 3 lug wrench out there, but I didn't want to mar the finish, and I'd have to pay/wait for it to arrive. I can just use this with an existing wrench, then dispose of the negligible amount of plastic when finished. EDIT 8/23/16: Most of you will probably find this tool more useful unless you're lucky enough to have access to a DMLS printer:http://www.thingiverse.com/thing:1733574 This is a 'socket', that is a 'knob'. Critical differences.:P Print Settings Printer: Rafts: No Supports: No Resolution: whatever Infill: 100% Notes: I used PLA, and printed the *_FDM.stl one so it'll stick to the bed easier. Post-Printing I recommend printing the one ending in _FDM, which does not have the nice edge blends on the bottom side, so that it'll stick to the bed of your FDM printer. If you're lucky and have an SLA printer, by all means go for the other Custom Section Use Pretty self explanatory, but should you require instruction, allow me to elaborate on how to use this elegant, purpose-built tool! After hand tightening, remove your handguard or make the 3 lug mount fully accessible. For MPX, removal is super easy and by pushing out the front takedown pin, the handguard is released and can be pulled off the front.