UTG Pro AR-15 Mil-Spec 6 Position Buffer Tube

The UTG Pro receiver extension tube is a 6 position, mil-spec diameter buffer tube for AR-15 rifles. It threads into any standard AR-15 lower and takes a mil-spec diameter collapsible stock, which is sold separately.

It is machined from aluminum with rolled threads for solid engagement with the lower receiver, and it is finished in matte black hard coat anodizing. Tight tolerances give a zero gap fit with the stock. It takes a standard carbine buffer and spring.