If you are looking to replace parts or upgrade your AR-15 rifle with some new parts then you have come to the right place. This particular Buttstock Receiver Extension Tube is made by DPMS. It is designed to work in conjunction with individuals who wish to use a Military Specification Diameter Collapsible stock assembly or a similar stock that utilizes a carbine style receiver extension tube.

Specifications and Features:
DPMS Carbine Buttstock Receiver Extension Tube F407229
Thread Size 1 3/16-16 UN 3B Special
6 Position Carbine Buffer Tube
Military Specification/Diameter
7075 T6 Aluminum
Level II Hard Coat Anodized
Tube only (Buffer and Spring are sold separately)
Matte Black

Fits:
AR-15 and similar pattern lower receivers.