I have built many AR's and installed all different types of handguards but never a Seekins. Now this barrel nut only had four holes that go all the way through for the gas tube, which limits the timing of the barrel nut. It installed well, I tightened it down three times and backed it off before I did the final and torqued it to specs. When I put the hanguard on the top rails had a gap? In order to get the nut a full quarter turn to the next gas tube hole it would be far beyond the torque spec (maybe not even possible to get that tight). Also looks like to much exposed threads on the receiver like the nut is not threaded on enough.
I did email Seekins and they did respond the same day and ask for pictures and told me it was a two piece barrel nut. I do not how this is a two piece, I used the hex end on the front of the nut to tighten it. I'm waiting for Seekins to answer me, but thought maybe someone here has installed one of these or just have some experience with Seekins handguards.20180207_172525.jpg