“Rocket launcher” seems like the wrong phrase to describe something that looks like a cannon. Rocket launchers are tubes with the back open because the rockets propel themselves through the air. The launcher itself doesn’t propel them. Rockets just need a guide to get started off in the right direction.
This is a high powered miniature rocket launcher, they differ from your average rocket launcher in that they resemble canons. /s
I know the name of the group is “out of context comics”, but I’d love to know what comic this came from.
Looks like Antman.
Close. That /is/ Antman in the cannon, but it was technically a crossover in a Fantastic 4 comic: F4 #16, Jul. 1963, according to my note. As for context, I don’t remember exactly what was going on but I had clipped three panels: