unique design ultralight 7'' inch m-lok handguard rail float picatinny mount system _black/red/tan color

length : 7 '' inch length barrel nut : steel barrel nut barrel nut thread spec.: 1-1/4-18 unc barrel nut inside diameter : 1.02'' ( 26 mm) barrel nut outside diameter : 1.35'' (34.4 mm) this is a new m-lok style handguard rail, which is full chamfer design. very smooth and beautiful . hope you will love it. ultralight stye, fit .223/5.56 rifle