The Midwest Industries AR-15 Barrel Nut Wrench is a professional-grade armorer’s tool for installing and removing key AR parts (Midwest Industries part no. MI-BNW). It is machined from 17-4 stainless steel and has a drive end made to fit all Midwest Industries free float barrel nuts. A three-notch castle nut driver handles buffer tube castle nuts, and a 1/2-inch drive interface lets you use a torque wrench to tighten to spec. It works for 5.56 and 7.62 AR platform builds, whether you are assembling a new rifle or servicing an existing one.

Key Specifications

• Material is 17-4 stainless steel, chosen to withstand repeated use.
• The drive end fits Midwest Industries free float barrel nuts, including CRMHD, CRM, SLH, CRT, CRLW, ULW, G3M, G4M and SP Series handguards.
• A three-notch castle nut driver engages buffer tube castle nuts securely.
• A 1/2-inch drive accepts a torque wrench for proper installation.
• It is designed for 5.56 and 7.62 AR platform components.

Frequently Asked Questions

Which barrel nuts does the wrench fit? The drive end fits all Midwest Industries free float barrel nuts, including the CRMHD, CRM, SLH, CRT, CRLW, ULW, G3M, G4M and SP Series.

Can I use it with a torque wrench? Yes. It has a 1/2-inch drive for a torque wrench.

Does it work on castle nuts? Yes. The three-notch driver engages buffer tube castle nuts.

Buy the Midwest Industries AR-15 Barrel Nut Wrench

Order it from our Lubbock, Texas gun shop for fast, direct shipping, and see more gunsmithing tools in the catalog.