This BCM AR-15 Complete Lower Receiver W/A5 BUFFER incorporates a BCM intermediate size receiver extension as well as a Vltor A5H0 buffer to provide the advantages of the Vltor A5 buffer process. The lessen receiver is machined from 7075-T6 aluminum forgings using a Mil-Spec really hard coat anodized end https://israellaqzn.newbigblog.com/34655541/ar-15-full-lower-receiver-w-a5-buffer-bcmgunfighter-inventory