This AR-15 receiver extension (buffer tube) from Bravo Company is machined from 7075-T6 aircraft aluminum and Mil-Spec hard coat type III anodized black. It is manufactured to Mil-Spec dimensions and specifications. Mil-Spec receiver extensions have a slightly smaller diameter than commercial at the point where the stock slides on, so be sure to choose a Mil-Spec stock to use with this tube for the best fit.

Features and Specifications:
Manufacturer Number: BCM-STOCK-HARDWARE-KIT
7075-T6 aircraft grade aluminum
Mil-spec hard coat type III anodized
Mil-spec dimensions
Black