I repeat the RimfireCentral thing and in just about every forum, especially Rimfire central, try a search before asking questions. It's all been answered before - many times over.
Ok, that being said... Having built a few of these my best advcie is also to decide what you want as a finished product. Going for just a fancy looking yet cheap looker or performance. Second, decide on your budget before you get too far into looking at parts. That'll help prevent overspending due to "that's cool sticker shock reality". From there, happy building.