@bigfelipe No issues with the Grunt on the 7.5" barrel? I imagine the exo helps in that regard also.
I've never had mine back off any of the AR's I've used it on, but I put a could layers of Teflon tape on the threads just to be on the safe side
I've never had mine back off any of the AR's I've used it on, but I put a could layers of Teflon tape on the threads just to be on the safe side