Outerwild AR15 Premium Line Handguard, 7in M-Lok, Black Anodize, 4005-1009-104-O

Unlike many manufacturers who simply cut holes and slots in their extrusion we machine every surface of the exterior to ensure a uniform and flat surface. Outerwild's 4140 steel barrel nut does not need to be indexed for gas tube clearance and easily installs with a standard castle nut wrench.