USED but never fired through AT ALL 

Constructed from 7075 T6 Extruded Billet Aluminum

13 position 308/A5 lower extension buffer tube (8")
Type 3 mil-spec hard coat anodizing with Teflon sealer
Mil-spec diameter
Weighs Approx 3.9 ounces
Features a detent lock to prevent tube rotation and support carrier
The buffer tube has a mil-spec AR10/SR25 length, ID, and depth.  If using for an AR15 build it is intended to be used with a rifle length action spring and a A5 buffer.  If using as an AR10/SR25 build it is intended to be used with a rifle length action spring and a carbine buffer.

***Buffer tubes no longer have "drain hole" on the bottom of the tube***