The slim line m-lok handguard is constructed of 6061 aluminum with a continuous 1913 picatinny top rail two integral anti-rotation qd sling sockets and three sides of m-lok.This free-float handguard also utilizes a 4140 heat treated barrel nut 4140 heat treated torque plate and is fully dehorned and deburred.It 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 DetachFree Floating: Yes