Outdoor Connection BTNW-28197 M4 Buffer Tube Nut Wrench Black Phosphate Steel

The Outdoor Connection BTNW-28197 Buffer Tube Nut Wrench is a purpose-built armorer's tool designed to install and remove the castle nut on M4, CAR-15, and carbine buffer tubes, and to seat a single-point sling adapter plate during installation.

Constructed from tuff-steel and finished in black phosphate, this wrench is built for repeated shop use. Its head features three integrated lugs that engage the buffer tube castle nut for a secure, slip-free fit during torque application, while a soft rubber black handle provides a comfortable grip so you can apply the necessary force without slipping or marring the finish.

Produced by Boyt under the Outdoor Connection brand, the BTNW-28197 is a compact, no-frills addition to any AR-pattern armorer's or gunsmithing kit. Whether you are assembling a new carbine, swapping a buttstock, or mounting a single-point sling plate, this wrench gives you the leverage and fit needed to properly torque the castle nut.