I just added a French Mas 49/56 semi auto --- with grenade launcher and muzzle brake --- {converted to 308...use only with 168 grain bullets} to my collection last week. It's still Maryland compliant legal here in Maryland --- the M1A is banned for sale along with the CETME rifle. I paid $500 for the Mas...minus the high scope mount which costs $110.
I would avoid buying the cheaply priced --- black box 308 Wolf Performance ammo --- because they've been known for case head separation during firing.
One such incident occurred at our range last Saturday, with a shooter firing a 308 Enfield Ishapore rifle. He received gas to his face from the two gas relief ports on the receiver; while using a Wolf Performance 308 round.
It sports a 10 round magazine, but buy only 7.5 caliber magazines for Mas 49/56 in 308, because the magazines that have been converted to 308 might have been tinkered with the wrong way; that does not ensure proper reliability.
Of course...an M1 Garand in 308 is not so bad. I'm about to buy my first M1 Garand, this coming Saturday, only in 30-06.