One-piece, MIL-STD 1913 Picatinny rail allows mounting a variety of optics and tactical sights on popular Mossberg, Remington, and Benelli shotguns. Streamlined, low profile design installs to the top of the receiver for a smooth "built-in" appearance. Four slotted flat head screws and washers secure rail to receiver for exceptional holding power. Precision machined from 6061-T6 aluminum, then mil-spec Type III hardcoat anodized for added strength. Fits shotguns with factory drilled and tapped receivers or receivers custom that require drilling and tapping for appropriate threads. Mfg: Mesa Tactical Products SPECS: 6061 T6 aluminum, Type III hardcoat anodized, matte black. Fits factory drilled and tapped receivers. Includes mounting hardware and instructions. Mossberg - 5A 1/2" (13.9cm) long. Fits 1997 and later-mfr pump action shotguns; can be installed on 930 semi-auto with additional