Brownells new AR-15 Armorer's Wrench works with either encapsulated or peg-style barrel nuts. The long handle ends with a carbine buttstock wrench that features four teeth that ensure full engagement of all four notches in an M4-style receiver extension nut for easy removal and installation.
Also includes a 1/2" square drive opening for torque wrench application, 5/8" and 3/4" slots to fit receiver A2 receiver extensions and flash suppressors.
AR-15, Issue:11, Page:084
Big Book Catalog, Issue:72, Page:087