The Breakthrough Clean Armorer’s Wrench (brand part no. BTAR15AW) is built from titanium-plated stainless steel for AR15/M4 castle nut and receiver extension work. Made by Breakthrough Clean Technologies, it includes a standard muzzle device wrench flat and mates with both Mil-Spec and pin-style barrel nuts, plus a bonus buttstock screwdriver for stock hardware. It’s compatible with a socket or torque wrench, so it works whether you’re hand-fitting a part or torquing to spec.

Key Specifications

• It’s made of titanium-plated stainless steel, giving it corrosion resistance beyond a plain steel wrench.
• It installs and removes receiver extensions and castle nuts on AR15/M4-pattern lowers.
• It works with both Mil-Spec and pin-style barrel nuts, covering two common barrel nut standards in one tool.
• A standard muzzle device wrench flat is built in for flash hider and comp installs.
• It’s socket and torque wrench compatible, so you can drive it by hand or to a specific torque spec.
• It ships with a bonus buttstock screwdriver for A2 stock plate screws at no extra cost.

Frequently Asked Questions

Does this wrench work with both Mil-Spec and pin-style barrel nut systems? Yes, it’s built to function with both, which most single-purpose wrenches don’t cover.

Can I torque castle nuts and barrel nuts to spec with this tool? Yes, it’s compatible with a standard socket or torque wrench for accurate torque application.

Buy the Breakthrough Clean Armorer’s Wrench

A titanium-plated wrench that covers barrel nuts, castle nuts, and muzzle devices earns a permanent spot in the range box. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and see more of our gunsmithing tools.