The Mark AR mount features a 5 bolt design for a secure hold, 3 lugs on the bottom to withstand any kind of recoil, and a STANAG fit which means more contact area with the Picatinny rail for an exact fit. Don't leave your rifle system's accuracy to chancethe cost efficient Mark AR mount is the answer. Punisher tested and verified. Lightweight aluminum design. Made in USA. Lifetime Performance Guarantee.