Video from GunCraft101 showing you how he built his AR-10 from bullet brass, or shell casings made of brass. We don't know if you can build an AEG from plastic BBs though... "I start out making a wooden pattern to make a greensand mold, then I melt 1425 brass casings of various sizes to make a 13+ pound blank. hen the machining begins! After many hours of precision machining, I'm left with...well, watch the video and you'll see.

I was incorrect when I stated that many of the primers are aluminum. I knew they were silver and non-magnetic so I ASS-umed aluminum. I've since learned that older primers were copper, occasionally nickel plated for corrosion resistance. Most of the newer primers are brass, and again, the silver colored ones are nickel plated."

Read more here.