Bravo Company Kit Stock Kit W/ Buffer, Tube, Spring, & Hardware AR Rifles Fits Mil-Spec Buffer Tube Only BCM-Stock-Hardware-Kit 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.
Specifications and Features : 7075-T6 aircraft grade aluminum
