A multi-function AR-15 armorer's wrench covering the core tasks of a build. It combines a castle-nut spanner for receiver-extension work with barrel-nut and muzzle-device wrenching surfaces.

Features:

• Castle-nut spanner and pin for receiver-extension work
• Barrel-nut wrenching surface
• Muzzle-device wrenching surface

A straightforward wrench for standard AR-15 castle-nut and barrel-nut work.