Yeah, it involves major surgery to your Garand receiver. So what? Gunsmith who does it at the link. You’ll have to sign up for FAL Files Forums, but why aren’t you already, hm?
Now if you could work a Shuff’s Mini-G conversion on that bad boy, you’ve got yourself a Socom 16. Yes it costs a hell of a lot more by the time you’re done, but need I remind you that in California, Garands are among the few rifles that can be lawfully passed between residents with no paperwork or background check whatsoever?