You may need to call ANS so someone can walk you through everything you need.
The bolt that heinous linked you would work.
Plus You will need a striker, buffer, main spring, spring guide, flat disc, striker plug, disconnect pin and pin lock.
Get a rebuild kit while you are at it.
If you get stuck on assembly and need help, call our main office and press 0 for the operator and ask her to get you a tech.