Hello gents,
I have an 243 AI barrel I'm selling to a friend. I've done a few conversions but never this one. I know we will need a new bolt head and baffle. magazine follower. My question is, if I take the spacer out of the magazine will it work, if not, where can I buy a new box. What other parts am I leaving out?

Converting a M12 fv staggerd feed .204 to a 243 AI.

Thanks in advance.