Georgia had a naval militia. They even have a nice little plaque on the side of the road down on Saint Simon's Island.
You could get .50 cals post WWII as well. I'm sure someone, especially with the amount of USAAF armores mustered out of the war could have made that work.
NRA Life Member
Big Sister: "You should be sponsored by Allen"
Me: "If you can't shoot good, at least look good walking to the firing line."
Big Sister: "Can you not afford a Pelican? Then buy an Allen gun bag."