The good folks at Brownell's are one of our sponsors. I would recommend them most highly. They are the best vendors in the gun business today. You will never find any better customer service.
Anyway, here is a link to a Brownell's video showing you how to build your own AR-15. Brownell's has all the parts you need. ( Now if you bear my child, let's call him Gene after Mr. Stoner)
YouTube - How to Build an AR-15 - Visit howtobuildanar15.com for more
Mr. Squinty