[quote=@Vordak]
<Snipped quote by Skallagrim>

A limit to caliber or bullet weight would be nice too, since otherwise, one could also just bring in a shotgun with a 200 millimeter barrel, firing a shitton of pellets at once - pretty much the equivalent of a machine gun.
[/quote]

Could just make it so Shotguns have to be pump loaded or whatever the term is for a shotgun you have to cock everytime you want to shoot it, that way you get one good shot.