Tapco AR Receiver Extension Tube Kit Mil-Spec
The best Mil-Spec extension available today, the tube is impact extruded, producing a much stronger part. This is done using 7075 T6 Aluminum, the same material as most AR receivers. The inside of the tube is coated with Mil-Spec dry film lubricant that not only keeps the action quieter; it reduces metal-on-metal contact, extending the service life of your buffer. While most other tubes are anodized or have no finish, the outside of the tube is grit blasted to leave a non-reflective surface, then coated in Mil-Std 171 Lusterless Black for a smooth matte finish.
Tapco ZAR09106 Mil-Spec Black Tube, Spring, Buffer, Castle Nut, Tapco AR End Plate Sling Adapter