Ok thanks, mine is turning out to be an issue. I tried tightening it a bit and re installed the handguard but it was not enough torque so it loosened off again. I cranked it tighter but now the screw holes won’t line up. There is no way I can crank it enough to get to the next set of holes.
So I guess the nut face needs to be ground down a bit so it can be properly cranked down to the next set of holes. I’m not messing with that so I guess it’s going back for warranty service. I’m kind of surprised it made it out of the shop with a loose nut like that.