Just joined this great forum. Bought a 66-6 w/2 1/2 in barrel in 2004 because salesman said it was a good home defense gun. Had no clue what I was buying other than the S&W name. It's not my CC piece but it is my favorite range gun by far. My question is "what have I got?", should I be leary of the "lock" as it is my primary home defense gun? My wife has a 60-7 and loves it.