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Overall when installed well it works and has some nice features like the M-Loc slot.
The bad. The instructions say 20 in-lbs for the screws. Don't do it. 13-15 in-lbs max. At 20 in-lbs the mount grips can distort the stamped steel of the gun causing charing and bolt sliding difficulties. Also, while the clamps are a nice hardened steel, the screws are cheap and can strip out easily... ask me how I know.
Overall I would probably buy something else if I was doing it again. This isn't an awful choice and it's functional, but there's better out there.
First, it's an upper, and it seems to be in spec. So there isn't a ton to say beyond the hand guard attachment. I like the thought of offloading the stress of the hand guard off of the barrel nut and on to the upper frame. Does it change anything? I have no clue. I had one of the enhanced hand guard from another build, so this made sense for me. The styling is good. It mates up to my lower with almost no gaps and there is zero movement between the upper and lower when pinned.
Looks great. Shot perfectly. Put this together with an inexpensive Anderson lower, Geissele 42 buffer, and SRC bolt, there was zero slop between them. Totally solid. First day at the range was thinking about tuning, 3:30-4:00 ejection right from the start. Very happy.