The combat m-lok handguard is constructed of 6061 aluminum with a continuous 1913 picatinny top rail two integral anti-rotation qd sling sockets and seven sides of m-lok.It also utilizes a 4140 heat treated barrel nut 4140 heat treated torque plate and is fully dehorned and deburred.The handguard includes a barrel nut wrench and 5-slot polymer m-lok rail.Made in usa.Rails: Picatinny/M-LOKFirearm Model: AR-15Material: AluminumFinish: AnodizedFeatures: M-LOKSwivel Studs: Quick Detach