I own a firearms manufacturing company. We produce billet (cnc machined) versions of the AR15 & AR10 rifles. We are located in AZ. Here's a few pics of what we do.
Semi finished ar-15 receivers in production.
Cutting the mag well on a billet AR15 receiver.
Machining accessory rails.
Pistol receiver extension we manufacture.
Upper and lower receiver set in the white prior to anodizing.
One of our finished products. An AR15 Pistol.