Bumping this back up.
I found the below information:
Specifications for a U.S. 1/2 barrel keg
Height of keg 23.3 inches
Diameter of keg 16.117.15627 inches
12 fl oz servings 165.6
16 fl oz (1 U.S. pint) servings 124
Could someone with this freezer measure the internal dimensions for me?