Features: DPMS High Compatible 4140 heat treated barrel nut 1 7/16 - 16 threads Barrel nut wrench included Features patented 4140 heat treated torque plate Features aluminum anti rotation block For receivers with .210" tang height Length: 15.0" | Width: 1.750" | Height: 2.187" Weight: 14.5oz. Internal diameter of 1.50" Constructed from 6061 hard coat anodized aluminum Features five anti-rotation QD sockets for sling attachment Three sides of M-LOK compatible slots Five slot M-LOK compatible rail piece included 100 percent made in the USA *Does not work with DPMS G2*