7/9/10/11/12/13.5/15/17'' inch keymod/m-lok clamping style handguard rail float picatinny mount system_tan color printed

model no.: clamping style keymod / m-lok handguard rail material : t6 6061 aluminum color : tan color printed a steel barrel nut inlcuded barrel nut inside diameter : 1.02'' (26 mm) barrel nut outside diameter : 1.35'' (34.4 mm ) barrel nut thread spec.: 1-1/4-18 unc fit .223 / 5.56 rifle easy to install package includes: 1 x clamping style black handguard rail 2 x allen key 1 x steel barrel nut