Pretty much what Mike said. I'm afraid it would just go straight through a BG without doing enough damage to stop the fight. I sure wouldn't want to shoot it inside a house either because of it's ability to penetrate all sorts of things. If it was between that and no gun of course I'd take it. There's just too many better choices out there for self defense. I sure would like to have one for a fun range gun though!
"I have sworn upon the altar of God eternal hostility against every form of tyranny over the mind of man."