Fishu, go check out the "Votes for F6F Hellcat, now that the Zero is here?" thread in this forum, where its being discussed.
From the F6F-5 onward, it was possible to mount x2 20mm cannons, plus x4 .50's. Now, how many of the day fighter versions that were actually armed like this is in doubt.
But many of the F6F-5N's (Night Fighter versions) definitely had the mixed cannon and MG armament package.
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Vermillion
**MOL**, Men of Leisure
"Real Men fly Radials, Nancy Boys fly Spitfires"