Ar15 Armorer's Barrel Wrench

The NcSTAR AR15 Armorer's Barrel Wrench consolidates a dozen common AR-15 maintenance functions into a single 13-ounce steel tool. Built for armorers, gunsmiths, and home builders working on AR-15, M4, and M16 platforms, this wrench eliminates the need to juggle multiple specialized tools during upper and lower receiver work. Whether you're installing a free-float handguard, swapping a muzzle device, or adjusting a collapsible stock, this combo tool keeps the job moving without hunting through a toolbox. We stock it for shooters who want armory-level capability without armory-level clutter.

NcSTAR engineered this wrench to address the most common AR platform fasteners. The barrel nut faces fit GI-style nuts, free-float nuts with GI spacing, Daniel Defense pattern nuts, and YHM 1¾-inch configurations. A spanner section handles A2 (¾-inch) and 5/8-inch flash suppressor nuts, while dedicated wrench faces address M4 collapsible stock castle nuts and A2 buffer tube installation. The flat blade screwdriver tip removes A2 buttstock plates, and a lower receiver push pin tool simplifies takedown pin removal. A 1/4-inch hex bit drive socket and compatibility with both 1/2-inch and 3/8-inch drive sockets let you apply proper torque through a breaker bar or torque wrench. Every function is clearly labeled on the steel body—a patented NcSTAR design covered under US Patent D703,502.

This armorer's wrench earns its place on any AR builder's bench or in a range bag for competition day repairs. Home builders will appreciate having one tool that handles everything from barrel installation to stock adjustment. Unit armorers and professional gunsmiths can keep it as a reliable backup or dedicated station tool. The included 1911 barrel bushing wrench and tactical bottle opener add unexpected versatility. Pair it with a quality gun vise and vise block for secure upper receiver work, or explore our full selection of parts and accessories to complete your AR build.