"...lost a fight with a Mig welder..." Everything in every CF museum is welded shut or otherwise 100% deactivated. Knew a guy who loaned the Borden museum a fully operational .40mm Bofors gun, they promptly welded shut. never did find out how it worked out, but he was getting ready to sue 'em.
The C2 used any FAL mag. Supposed to be one of it's 'charms'. Don't recall ever seeing anything but a 20 though. PBI units maybe.