I have decided to build an AR from the ground up. Mainly to educate myself and also so I can make it exactly how I want it. I'm going to get the stripped lower from a local gunshop but I was wondering what website has the best deals on all other parts for building an AR-15? Pretty much any advice regarding best quality parts is what Im looking into at this point. Trigger kits, stripped uppers, barrels, gas systems, etc. Any advice or education is greatly appreciated.