You will need a bolt head and a barrel. Seems theres a bit of chatter about bolt heads being a little bit difficult to find at the moment tho.
You will need the proper tools to change the barrel out. An action wrench and a barrel nut wrench are the most common. I bought mine from Jim at NSS(one of our sponsors) Great to deal with and he also sells barrels as well. Since you will already have it apart might as well change the barrel nut and recoil lug as well.

You're rifle is most likely a small shank so you would need a small shank barrel.

Your mag box may or may not work, so depending on how you want to use the gun(either as a single shot or a repeater). Thats no big deal to change either if you need to.

Hope this helps! Keep us posted on what you decide or if you have any more questions.
Scooter