Guntec USA Ultra-Lightweight Thin M-LOK AR-15 Handguard - Black - 15"

the rail is good, very lightweight seems to be durable construction but I have a few gripes.

you need a skinny crows foot socket to install good luck finding one... lowes, autozone/advanced auto, tractor supply, harborfreight, ace hardware, and a few others didnt have one that big, and I suspect if they did it would be too wide.

Include a cheap chineseium crows foot socket so someone can properly torque down the barrel nut.

Also the barrel nut only has threads on one side so hopefully you can get it to line up with the single included shim.

Rail seems to function fine but ID was just a little too small to comfortably space itself over an adjustable gas block. The barrel nut, as others have mentioned, requires a narrow wrench which is stupid. The flat spots could have been widened to prevent marring. Finally, if shimming is required to properly align the mounting screw locations, why couldn't they slot the mounting screw holes on the HG? That way you're ensured minimal gap between the upper receiver rail and the HG rail.

Being an AZ guy I wanted to like this rail. Sadly, spent another $40-60 and get quality. It requires a crow foot wrench that you need to order from Guntec at an additional $20 plus shipping. If you somehow mount the barrel nut without their tool the aluminum barrel nut will be marred up. It is virtually impossible to install so that the receiver and hand guard top rail align. The UTG has a better system if you watch their video. I will leave this Guntec junk on until I can get another Troy rail that I should have bought in the first place. Primary Arms is still the best in the business.

Very lightweight, solid, good looking handguard. My only criticisms are: 1) A tad more work to install, because the barrel nut has to be timed in order to install the handguard with the top rail at exactly 12 o'clock. I wish it was clamp or friction style. 2) It has an aluminum barrel nut, which is okay if your intention is to keep your build as light as possible, but I prefer a steel barrel nut. 3) Doesn't come with a barrel nut wrench. For the money, this is an outstanding handguard.

Wow, it’s been a solid year and it’s a good upper. A little heavy than advertise but prestine look on the AR. It literally requires 6 star/torq screws to hold it in place. Set it with locktite and your golden. Make sure the barrel nut is torque to spec/ft lbs. Not bad for price and it’s quality.10/10 would recommend.

The most easiest install ever. fits just perfectly fine with low profile gas block. Worth every penny for a light weight Handguard. No need to buy additional tools. 1-1/4 wrench works just fine.

OK this thing looks nice and is lightweight. But it takes a oddball wrench size to install it. It will sit on the rack until I have a reason to buy the wrench. Shame because I do like the piece but I have been buying tools for a lot of things that should have been a standard size or a crows foot wrench should have been included with it if the size is not a standard size.

Would’ve given 5 stars if it came with it’s own tool needed to tighten down the barrel nut that’s an odd size and most armors’ wrench won’t fit. A digital caliber on the flats of the included barrel nut measures 1.28 or something like that . About 1-3/16 for exact size but a wrench that size will be too tight and not fit . I took a risk and hooked my castle nut wrench into the threaded holes( I know I know - but I’d re tap them worst case scenario) so I could get my torque wrench reading close . Then had to use a crescent wrench to bump it about another 5 degree to get the handguard holes to Line up how I wanted (which are slotted anyways to there’s room to still get the screw in ) and the pic rail in line. All in all I wouldn’t hesitate to buy another one once I buy the wrench from gun tech.