The Midwest Industries Premium AR-15 Barrel Nut Wrench is a professional-grade armorer’s tool engineered for reliable installation and removal of key AR platform components. Machined from rugged 17-4 stainless steel, this wrench is built to withstand repeated use while delivering a precise fit for Midwest Industries free float barrel nuts and standard castle nuts.
Designed for both 5.56 and 7.62 AR platform rifles, the MI-BNW features a dedicated drive end compatible with all 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 provides secure engagement for buffer tube castle nuts, while the integrated 1/2-inch drive interface allows use with a torque wrench for proper installation to spec.
Whether you're assembling a new rifle or servicing an existing build, the MI-BNW offers the durability and versatility serious builders demand.
- Midwest Industries Premium Barrel Nut Wrench
- Designed to work with 5.56 and 7.62 AR platform rifles components
- Drive end for all MI free float barrel nuts - Including CRMHD, CRM, SLH, CRT, CRLW, ULW, G3M, G4M, SP Series
- Castle nut driver with 3 notch engagement
- 1/2 inch drive for torque wrench
- Premium construction for repeat use
- 17-4 stainless steel material
