A multi-function AR-15 combo wrench that handles the full range of common build tasks. It pairs a castle-nut spanner with barrel-nut and muzzle-device surfaces in one tool.

Features:

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

The most complete of the AR-15 wrench options, covering castle-nut, barrel-nut, and muzzle-device work in a single wrench.