I ordered the 4” for a pistol build and looks great on my juggernaut tactical dedicated 9mm. Anti-rotation tabs do not fit on their upper so had to take a Dremel tool and cut them off. Other than that I am not disappointed especially with how much it costs.

I love how easy they are to install! I have 2 - 7in for pistol builds and 1 - 12in on a 18in 223 Wilde build.
YOU CANNOT GET BETTER FOR THE MONEY

Great product! Great fit! Easy to install! Lightweight! Great engineering! I installed my 7” .223 Wylde barrel. Used the provided steel barrel nut, tightening and loosening three times. Slid the handguard on and tightened the side set screws into the barrel nut slot and tightened the two bottom clamp bolts, finished. The anti-rotation tabs, set screws, and clamp bolts keep the barrel nut from loosening and the barrel nut clears the gas tube. Looks great on my AR pistol and I am well pleased with this product. Will be buying more for future builds.

Very well made and hreat fit... the accessory rails and M-Lok hardware are better than any other brand i have tried... have ordered several things from this site and have NEVER been disappointed!! Thanks again and will be ordering again soon.

Ordered the 15in rail which was delivered in 4 days (including the weekend). Rail is light, rigid and well made to correct M-Lok specs. Barrel nut fit perfectly. My only issue so far with this rail ( actually, any rails of this type) is that it DOES NOT fit the slick side upper in kit 223UP-BL2+223LOWER-BL. The antirotation tabs will not fit along the sides of the picatinny rail in the same way they fit a regular mil-spec upper. For use with this upper, you will need to file off the tabs, insure the barrel nut is torqued to proper spec and use a one piece scope mount or other device to keep the rail and upper aligned during assembly.