The Midwest Industries Armorer’s Wrench (brand part no. MIARAW) is designed to work across 5.56 and 7.62 AR-platform rifle components, covering both encapsulated and pin-style barrel nuts, including the GI-style nut. It has a drive end sized for all Midwest Industries free-float barrel nuts (CRM, SLH, CRT, CRLW, ULW, G3M, G4M, and SP series), a wrench flat for A2 muzzle devices, and a fit designed to work the thin flats on many popular suppressor mounts. A castle nut driver with 3-notch engagement, a combat bottle opener, and a small hammer head are all built into the handle, and torque specs are marked directly on the tool. It is constructed from 4140 heat-treated steel with a 1/2-inch drive for a torque wrench.

Key Specifications

• It services 5.56 and 7.62 AR-platform components, including encapsulated and pin-style barrel nuts.
• The drive end fits all Midwest Industries free-float barrel nuts (CRM, SLH, CRT, CRLW, ULW, G3M, G4M, SP series).
• A wrench flat services A2 muzzle devices and many popular suppressor mounts.
• A castle nut driver with 3-notch engagement is built into the tool.
• A combat bottle opener and small hammer head are also built in.
• Torque specs are marked directly on the handle, and it uses a 1/2-inch drive for a torque wrench.
• It is constructed from 4140 heat-treated steel.

Frequently Asked Questions

What barrel nuts does this wrench fit? All Midwest Industries free-float barrel nuts (CRM, SLH, CRT, CRLW, ULW, G3M, G4M, SP series) plus GI-style and pin-style nuts.

Does it include anything besides wrench functions? Yes, it has a built-in combat bottle opener and a small hammer head in addition to its wrench and castle nut driver functions.

What steel is it made from? 4140 heat-treated steel, with a 1/2-inch drive for use with a torque wrench.

Buy the Midwest Industries Armorer’s Wrench

From barrel nuts to muzzle devices to a bottle opener at the end of the build, this wrench covers the whole bench. Order it from Midwest Industries through our Lubbock, Texas gun shop for fast, insured shipping, and browse more of our gunsmithing tools.