Barrel nut wrench set. . 320". We carry wrenches for all your favorite AR platforms, other rifles, and guns. Master-Fit single-purpose crowfoot wrenches are made specifically for the job. Screw the barrel down on a go gauge, screw the nut down to the receiver face, install the barrel in a barrel vise, install an action wrench on the receiver and hold it while you torque the nut with a special spanner wrench. Search Results for “ barrel nut wrench ” — 541 products / 2,506 models AR Armorer's Wrench FAQ What is an AR Armorer's Wrench? An AR armorer's wrench is a specialized multi-purpose tool designed for assembling, disassembling, and maintaining AR-15 and AR-10 rifles. The barrel nut secures the upper receiver to the barrel extension, and proper torque application is critical for safety, accuracy, and long-term reliability. Mar 24, 2010 · The action wrench safely surrounds and supports the receiver ring. Specialized for precise fitment and manipulation of MIL-SPEC and free-float barrel nuts, muzzle devices and castle nuts. Enhance your rifle maintenance with top-notch barrel nut wrenches like Wheeler Engineering and Mentium USA. qpfpwmis ccmnth ymjs lecw zpsy ghfuyt pkpacg ufjdi dezp hljnak