Fantastic acog mount - American Defense Manufacturing AD-B3 Modular Base

I recently got a 4x ACOG, but I could not stand the factory Trijicon mount. This mount has a single recoil lug, allowing for the mount to sit farther back on the rail of you're not running backup iron sights. The lockup is very firm. I tested return to zero at 50 yards, removing the ACOG and then reattaching, and this mount has a fantastic zero retention. I would highly recommend this if you're looking for an aftermarket ACOG mount or if there are other compatible optics that work with this.