No, they shoot debug messages

At one point there was a flintlock pistol in the game and a musket just in means of code, there are several mod using those bits,
Brother against Brother, Star Wars, Pirates!, Craftmod (and storymod that includes it), Liberty or death, The Perennial Nuisance, Age of Descent, WH40k Storm Over Tartarus, Western Mod, Dies the fire, Warhammer Mod (probably there are more)
Some of them moved over to MBX, some are half dead, some don't have 0.808 versions...
shameless plug;
But probably the Age Of Ash is the one that focus most on firearms, varying from makeshift, modern and collectible guns. And it is no where near a release, hehe.