The LaRue Tactical QD ACOG RCO Picatinny-Style Mount positions a Trijicon ACOG further to the rear for use with M16A2-length stocks, and are especially useful to users wearing body armor. The contoured aft-section allows easy access to charging handle. This mount was designed specifically for the Trijicon ACOG RCO (Rifle Combat Optic), but works with all ACOG models. The mount comes complete with replacement mounting screws with wrench, QD adjustment wrench, vial of blue Locktite and Instructions.