Castle Nut Wrench by Cross Armory


  • Best and strongest castle nut wrench on the market
  • Fits all AR-15 and AR-10 castle nuts
  • 2x thicker than standard castle nut wrench
  • Made from ultra high strength, high-carbon steel
  • Case hardened and black oxide coated


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The Cross Armory Castle Nut Wrench provides a perfect fit for Mil-Spec and commercial buffer tube castle nuts. Torture tested and proven to outlast all other competing castle nut wrenches! Each wrench features a rubberized grip for improved performance, 2X thicker material, case hardened High-Carbon Steel and the reliability, safety and comfort you have come to expect form Cross.


  • Manufactured from heat treated steel
  • Rubberized Grip

Performs the job of a:

Mil-Spec castle nut wrench & standard length receiver extension removal wrench