Well... a gun can fire anywhere from six to... god, I don't even know the max mag clip count for bullets. Allison might. But yeah. Lots of bullets. A grenade is like... you throw it and it explodes. Rocket launcher could blow up a car... um, wait, a cart? Cart. Or like, a house. Hut? I don't know what you guys have.

Then there's an atom bomb which could blow up an entire city. Or two. Castles? BOOM. Gone. Destroyed. Everything destroyed for miles. When my world has wars, they have wars.