I'm not sure if it's my advancing years, but stoooopidly large weapons really annoy me now
I have a stash of pistols and other normal sized weapons from various places (mostly Foundry Street Wars) and happily replace the silly ones with less silly ones.
Reaper have some figures guilty of this as well, including one with a sniper rifle as tall as the figure holding it (a bit like the one second right in your bottom picture
)