I’ve been a gunsmith for about 20 years now, and I’ve used Ohhunt products many times in the last 4 years. These AR-15 Ultra Slim Free Float M-Lok Handguard are great quality at a great price! I have installed about 30 of them so far on various rifles, including 4 of my own, and have never had any issues. One rifle that has these handguards installed on it has been through 3 carbine course, 1 CQB course, and multiple other rigorous training programs, without any issues. The steel barrel nut, when properly torqued, holds firmly, and the handguards themselves work well when attaching lights, grips, slings, and NVD’s. Additionally, the PEQ-15 held zero when removed and reinstalled as well. My only note would be to proper torque on the handguard screws with an application of blue Loctite, but then, that would be the same on any handguard. Overall, these are great handguards and I would recommend them to anyone wanting to build or upgrade an AR-15.