A couple things I tell people when it comes to deciding on building or complete is this... You build it, you have the satisfaction of saying "yes" I built that. On that same note, if something goes wrong, you need to know how to diagnose and repair it too. You buy a complete rifle, it comes with a life time warranty. If something goes wrong, you can always call up and send it in. So theres a little bit on both sides. If you want to build though, ArmaLite has a kit that is almost complete. All you have to do is decide what barrel, furniture, and style of buttstock you want on it. ArmaLite gunsmith kits