[guitar Josh]

Get a semi-auto. I've seen people on the range forget to rack their pump action multiple times and couldn't figure out why it wouldn't fire until I told them. When you're in a situation that might cost you your life, get something where you don't need to think about as much.

That being said, I don't know your living situation, but if you live with other people or have other people over somewhat regularly, I would suggest you get an AR-15. If you're trying to shoot someone who is standing next to someone you're not trying to shoot, a shotgun is the worst gun you could use.

[Paul R.]

I do have an AR-15. More worried about it penetrating walls, tho’, than picking off a bad guy standing beside wifey..

[CivilWarBrewing]

"That being said, I don't know your living situation, but if you live with other people or have other people over somewhat regularly, I would suggest you get an AR-15. If you're trying to shoot someone who is standing next to someone you're not trying to shoot, a shotgun is the worst gun you could use."

No birdshot in the house.. SLUGS, MAN!.. SLUGS!!!

Collateral damage avoidance in crowds is exactly why cops carry slug shells for their shot guns.