The Magpul AR-15 Armorer's Wrench Multi-Tool is a heat-treated steel all-in-one solution for AR platform assembly, maintenance, and field work. Built American-made with a manganese phosphate finish, this 11.7-inch wrench handles the core tasks that come up whenever you're working on your rifle—from barrel nut installation to receiver extension changes—and adds practical touches that make it worth carrying to the range or keeping in your shop.

This tool fits both stock and pin-style barrel nuts, so you're not locked into one setup. The extended teeth work with receiver extensions and carbine castle nuts, and the wrench is sized to work with a standard ½" torque wrench. Two integrated hammer faces let you tap components home without reaching for a separate mallet. Because it's a multi-tool, you also get a bottle opener that accommodates both metric and SAE caps—a small feature that adds genuine utility during a long day at the range.

At 1.1 pounds and 0.35 inches thick through the handle, the wrench balances heft with usable leverage. The solid steel construction and manganese phosphate finish hold up to hard use, and the torque specs printed directly on the tool mean you don't have to hunt for reference numbers when you're setting a castle nut or barrel nut. Whether you're a gunsmith running a professional shop or a hands-on owner who prefers to work on your own guns, this is the kind of tool that earns its space in your kit.

Key Features

• Fits both stock and pin-style barrel nuts for flexible AR builds
• Works with standard receiver extensions and carbine castle nuts
• Extended teeth compatible with ASAP plates
• Two hammer faces for driving components without additional tools
• Works with ½" torque wrench; torque specs printed on the tool
• Integrated bottle opener for metric and SAE caps
• Heat-treated steel with manganese phosphate finish resists corrosion and wear

Specifications

Material	Heat-treated steel with manganese phosphate finish
Length	11.7 inches
Weight	1.1 pounds
Handle Thickness	0.35 inches
Finish	Black (manganese phosphate)

Frequently Asked Questions

What barrel nuts and castle nuts does this wrench fit?

The Magpul Armorer's Wrench works with both stock and pin-style barrel nuts, and it's designed for receiver extensions and carbine castle nuts. The extended teeth also accommodate ASAP plates.

Can I use this wrench with a torque wrench?

Yes. The wrench is sized to work with a standard ½" torque wrench, and torque specifications are printed directly on the tool for quick reference during assembly.

What else does this tool do besides work barrel nuts?

Beyond barrel nut work, the wrench includes two integrated hammer faces for driving components, a bottle opener that fits both metric and SAE bottle caps, and it's designed to handle receiver extension and castle nut installation and removal.

Is this tool suitable for professional gunsmithing, or is it mainly for home users?

The solid steel construction and comprehensive feature set make it suitable for both professional gunsmiths and hands-on firearm owners who maintain their own rifles.