No mention of what they were firing was even made, but I wanted you to assume ballistic rounds. These gangsters can't come into contact with actual military - remember, they were more of an all show gang, like the one publicized by mass media. Because of this, they could only get this basic shit made. And yes, Iktomi is OP as hell, but that's because I let him be. These Blood Saints aren't all that dude... the small GM squad wiped out like all of them without losing anyone, until they got to the boss kages.

EDIT: For BBeast, hell yes, there are guns that shoot fire lightning and what not. In fact, that's the majority of the military's weaponry. They have plasma rifles.