I have decided that I want to build an AR-10. That was the easy part. I have been looking at many kits and need to decide what exactly that I want, but I need to know what exactly I need. Are there kits that have everything or do you need to buy several different kits? Is there any major problems that occur when trying to build your own AR-10? I am in the initial stages of this and am just now going through the research, any help will be great!