In this installment of the Briefing Room, we talk about a vital piece to your AR15, the gas block. Mounting and having he gas block securely fastened to the barrel is a critical step of proper rifle assembly. Sadly there are still many manufacturers and even more builders that take short cuts when securing a low profile gas block on a barrel. In this video we talk about two of the different methods, excluding clamp on block, and the process for each. Hopefully this helps you in maybe your future build or knowing what to look for when looking at rifles.