Accepts Weaver Style Rings and Allows Use of Iron Sight. Mil-spec Quality Deluxe Sniper Mount for M14 and M1A Rifles. Picatinny 15-slotted Top Rail. Rear end locks into the charger guide dovetail. One Piece Machined from Aircraft-grade Aluminum Alloy with Black Matte Finish. Side Plate Features Locking Point, Horizontal Bottom Guide and Adjustable Side Screw to Provide A Rock Solid Foundation. Installs Easily, No Gun-smithing Required.