Real Avid Master-Fit Wrench,  Stainless Steel, Thin Castle Nut 

MASTER GRADE AR15 CROWFOOT ARMORER’S WRENCH

Master-Fit ½” Crowfoot Wrenches are purpose-built and specialized for precise fitment to minimize marring on gun parts. Constructed of titanium coated stainless steel, delivering the highest level of precision to confidently apply torque to AR platform.

DESIGNED SPECIFICALLY FOR GUN NUTS

Now you can say I’ve got a wrench for that! No more rigging and adapting generic wrenches to complete your builds.

Crowfoot wrench for pistol buffer tube castle nuts.

The Thin Castle Nut Wrench is designed to work with most pistol buffer tubes and pistol braces.
The Master-Fit Thin Castle Nut Wrench is purpose built and specialized for precise fitment to confidently deliver torque to castle nuts on pistol buffer tubes. Titanium coated stainless steel construction provides tight tolerances for solid nut-gripping strength and enhanced no-slip tool control. When paired with the Master-Fit ½” Drive Torque Wrench, this Master Grade combo will take your gun building experience to a whole new level. The Master-Fit ½” Drive Crowfoot Wrenches also work with any standard ½” drive wrench.