Wambli is 100% right about that. Buying a full rifle or full kit to get by with, and then eventually getting the parts you truely want is more expensive... I just never had the patience! You can go to any search engine online and find a parts list with an exploded diagram. I know Rock River has the diagrams, and then the parts listed with prices/upgraded parts on their website. They make it REAL easy to give them your money. As for tools, Brownells should have them all. Upper receiver vise block, lower receiver vise block, Barrel wrench (do yourself a favor and get the one with the half moon AND the two prongs, not just one or the other DPMS makes a perfect one), stock wrench (depending on what kind of stock you go with), And a punch set. The front sight block is a big help, but I know people who can go without it. Other than that, if you have a tool bag at home with various stuff you should be good. Did I forget anything, Y'all?