Research for Bare Minimum

I started a thread at the Grapevine right before I started my writing for Bare Minimum. I wanted to write the scene where someone comes in with two machine guns and started shooting the place up but I know little about guns so I asked.

It's kind of funny how many useless responses I got. I looked at some other guns on the page Mac referenced and I found one that is more like what I was imagining.

This part of the description is deeply terrifying:

For stationary use in prisons or during riots on the streets, ILARCO provided dual and quadruple mounts for American-180

The idea of someone just shooting 1200 - 1500 rounds per minute into a riot or a prison makes me dizzy and sick.