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