Lightweight, aluminum clamp locks barrel and extended magazine tube together to form a rigid, rock-solid assembly. Can be used as a tactical light mount: install a 1" diameter light in one side of the clamp and secure the other side to the barrel or magazine. Left- and right-side sling swivel sockets accept standard pushbutton swivels. Two steel Allen head screws pull the clamp halves together for a tight, non-slip hold. Also available with a 2" long, 4-slot, MIL-STD 1913 Picatinny rail that can be installed in the 3- or 9- o'clock position, for mounting additional accessories. Fits Remington 870, 1100, 11-87 and Benelli M1, M2, M4, M1014, 12 gauge shotguns. Mfg: Mesa Tactical Products SPECS: 6061 T6 aluminum, mil-spec Type 3 hardcoat anodized, matte black. Clamp - 1A 1/2" (3.8cm) long, 17/16" (3.5cm) wide, 15/8" (4.1cm) high. Rail - 2" (5.1cm) long. Includes mounting hardware. Fits Remington 870/1100/11-87 and Benelli M1/M2/M4/M1014, 12 gauge on