Here's some info and a few pics on the combat usage of mostly the J/Automatics LMG.
http://www.johnsonautomatics.com/combatuse.htm

Note the reference at the bottom of the page in the link to the Bay of Pigs invasion.

I did find this picture (note: pro-Cuban website) of victorious Cuban forces celebrating after the defeat of the invasion. Notice the J/A Rifle held high in the air in the back ground. Most probably a souvenier taken from an invasion member.
http://cubajournal.blogspot.com/2010/04/playa-giron-in-heart-of-cubans.html

The 'scope sighted bolt rifle in front is sort of interesting too..