Took a few pics during last weekends field trip to a WWII vintage Victory ship. These are 20mm Oerlikon machine guns, and the ship had at least eight in various states of completeness.
Technically the wartime ones all used 60 rnd drum magazines, this one below has a later era beltfeed adaptor and chutes...Check out the size of the ammo cans !
Too bad they are over .50 and fall into the DD category. (Not that I've seen a parts kit yet) Oh, I have posted some more pics of these in the Image Gallery, under Member galleries - Rocster