dude, the pump action sound totally just scares the bad guys away. works every time
But seriously, I feel like a carbine is more versatile than a shotgun... And where the average civilian has little time or money to spare, focusing on a carbine will give you better bang for buck. Buy and practice with a shotgun of course, but my vote is focus on the carbine... And truth be told, I use a 9mm handgun for HD because the only carbine training I have so far is what I've watched on the Magpul Dynamic Carbine videos
At least I realize that doesn't make me an expert...
And I'll be the first to admit I really really really don't like 12ga recoil on an 18in bbl pump...
Oh, and that first line was a joke if you missed that...