what needed to convert model 12 .223 to a .243??

[syclone01]

i assume a barrel change and bolt face? what about the internal magazine? thanks

[thirty06]

Beside's the barrel and bolthead, you'll need to change the mag box & follower.
You'll also need to change the front bolt baffle. Yours should have the dogleg on it to shorten the bolt throw.

[syclone01]

bolt baffle? i assume this isn't too expensive or hard to do? thanks

[bootsmcguire]

Not expensive or too difficult. Changing the baffle is easy since you will have to change the bolt head anyway. Midway has them as well as brownells and I am sure you can get one from SSS as well.

[Midcountry2]

I believe you also need to replace the extractor.

[squirrelsniper]

Nah, the extractor is the same.

However, some of the pre-AccuTrigger rifles have an extractor made with beryllium (they are sort of copper colored) that have given some people extraction problems (I never had any though) so a change to one of the new steel extractors might not be a bad idea if you happen to have the old style.

[syclone01]

thanks for the replies, it helps out in a possible decision.