AR15 Lower Receiver Extension Buffer Tube - MIL SPEC Model: UB_ASBT04
** Made in USA **
6 adjustable positions for attaching to an adjustable Mil-Spec buttstock stock. For AR-15.
Extended threads to make install very easy (castle nut can be moved right back / out of the way).
- Precisely CNC machined
- 6061-T6 Aluminum
- Use with adjustable butt stocks that are designed for Mil-Spec diameter buffer tubes (1.14").