Hey everyone, i don't really know much about building an AR15. I have skimmed through some of the stickies and I could say I partially understand the parts needed, though I am FAR from an expert, still very much a n00b at this. Correct me if I am wrong but from what I understand you need to have a lower receiver, a trigger assembly, an upper receiver, a barrel, and whichever sights you prefer. I found a website that sells everything you need but a lower receiver, and i wanted to check it out with you guys to see if its a crap deal/incomplete or not even what I am looking for. Here's a link http://www.ar15-kits.com/index1.html the one I'm looking at is the fourth down on the right, the M-4 style 16" rifle.