NCStar Gen 2 AR15/M4/M16 Armorer’s Barrel Wrench

The NCStar Gen 2 Armorer’s Barrel Wrench (brand part no. TARW2) is a black steel combo tool built for anyone servicing an AR15, M4, or M16 upper and lower. Made by NCStar, it packs a dozen distinct wrench and driver functions into one 12.9-inch tool so a home gunsmith or armorer isn’t swapping between a shelf of single-purpose wrenches. It’s built for barrel nut installs, muzzle device changes, and stock hardware work on a standard AR platform.

Key Specifications

• This wrench fits the GI barrel nut pattern, covering mil-spec AR uppers without an adapter.
• A dedicated free-float barrel nut fitting handles the wider nut used on most free-float handguard systems.
• The DD and YHM 1-3/4-inch spanner notch services Daniel Defense and Yankee Hill Machine handguard nuts.
• Both A2 3/4-inch and 5/8-inch flash suppressor wrench flats let it drive the two most common muzzle device sizes.
• An M4 collapsible stock castle nut wrench handles carbine buffer tube installs and removals.
• The A2 buffer tube wrench notch covers fixed-stock rifle-length tubes.
• A built-in flat blade screwdriver is sized for A2 buttstock plate screws.
• It’s cut for both 1/2-inch and 3/8-inch drive hardware, so it works with a standard torque wrench.
• A lower receiver push pin tool and 1/4-inch hex bit socket round out disassembly and small-parts work.
• A 1911 barrel bushing wrench profile and built-in bottle opener are included for range-day convenience.

Frequently Asked Questions

Does this one wrench really cover both AR15 and AR10 barrel nuts? It’s built around the AR15/M4/M16 GI and free-float nut patterns; it does not include the larger AR10-specific fittings.

Will it work with a torque wrench for proper barrel nut torque specs? Yes, the tool is machined for both 1/2-inch and 3/8-inch drive, so it mates directly with a standard torque wrench.

Is this suited for a first-time home builder or only professional armorers? Both — the labeled, all-in-one design is straightforward for a first AR build while still covering the fittings a working armorer needs.

Buy the NCStar Armorer’s Barrel Wrench

Whether you’re building your first AR15 or maintaining a rack of them, this wrench keeps barrel nut, muzzle device, and stock hardware jobs on one tool. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and pick up the rest of what you need in our gunsmithing tools lineup.