Fri Jul 21, 2006 8:17 am by MarkBranst
Not a military expert, but those guns look like quad-.50 cal to me ... I always thought pom-pom guns were named after the way they looked when they were fired .. the left bank would expand and contract, and the right bank would then expand and contract, as the fired, creating a visual effect, like a cheerleader with pom-poms ... But I may be completely wrong. Also, I think pom-pom guns would have been 20 mm or 40 mm.
Mark