Well made product, but will need tweeking during install - Guntec USA Ultra Thin Key Mod Free Floating Handguard w/Monolithic Top Rail

This handguard is ultra-light as advertised, because it is thin. I used it to assemble an AR pistol. It will not be subjected to the stress as it would have had I used it on a carbine. However, I see no reason that this handguard will not perform as designed. How strong it will be is subjective. The machining, fit, and finish was excellent.

Two things needed mentioning:

1) The barrel locking nut: The closest measurement to standard fractional sized tooling is 1-3/16th inch. My 1-3/16 crow-feet wrench will not fit on it. It is just a tad (about 1/32") bit too big. Next fractional size is 1-1/4. 1-1/4 is too big and would round the edges if I try to torque to the needed minimum 30 ft/pound. I ended up using an adjustable "crescent" wrench and tighten it "enough". Using the adjustable wrench did not allow me to use a torque wrench to measure the amount of torque applied. Fortunately, I had installed over ten AR barrels in recent months and had confident in the "feel" needed to have it at least 30 ft/pound. No need to over tighten to line up the gas tube...one positive thing about this design. Get it to at least what you "feel" is 30+ / under 80 ft/pound of torque.

2) Lining up the mounting screws for attaching the hand guard to the locking lug: Be prepared to use the provided shims to get the holes to line up. Also no instruction on this task were provided. Do some "dry" fitting first, and then grease it up and torque it down.

Lastly the mis-match with US SAE tools could be the fact that it is metric...but being made in the USA, I thought that was not likely.