At Historicon I had a chance to look at the Black Sun figures from Bob Murch. These are Vietnam figures but with two pulp science fiction forces added. One are these Deep Ones, for of Creature from the Black Lagoon looking. The ones for Black Sun come with AK-47s. Very similar Deep Ones are available in the Cthulu range. I bought the starter box of those and added a bunch of extra German WWII weapons. I was also told that the next pack of Black Sun Deep Ones will be armed with rifles, instead of AK-47s.
I have a giant alligator from Reaper that is crying to have a German infantry gun or heavy machine-gun mounted on its back!
If you value the lives of your pulp figures, tell them to stay away from the water, or a lot of little lead widows will be getting sad telegrams.