Obscure song played on a certain The Simpsons episode -- what is it?

I figure with all the Simpsons nuts around here, someone is bound to know.

It is in the episode where Homer starts his own security company called "SpringShield." Homer ends up ticking off Fat Tony, so Tony rounds up his boys from New Jersey (one of them is Johnny Tightlips). The song plays as they are driving to Homer's house. It's a mellow song and I think one lyric goes: "Gonna get me a gun.." or something.

Anyone know the name of this song? It's probably in the credits if someone has this episode on tape.

 

Oh. I've never seen the Sopranos.