Don't have a S&W with the lock but do own a little Taurus 85 snubby that has one. Never any problem with it. I've locked and unlocked the hammer a few times showing friends how it works but never use it otherwise. I do carry the key along with my others on the ring. I guess in a home with small children it might have some merit for a person too lazy to just put the gun in a safe place away from kids. Personally I think some kids, being smarter that many believe, would more than likely figure a way to get the gun unlocked since it's basically a hex key for the Taurus guns.
In my opinion a waste of money by a politically correct innovation brought about by IGNORANT people and politicians.
I don't have any experience with a S&W lock but I do with the Remington 870 'j' lock keyed safety. I can confirm that the Remington keyed safety can in fact be locked without the key but it can't be unlocked without the key. Not a good thing when you or your family may be depending on the firearm for protection.
"Hey, where's the key for the safety? Hurry up he's coming down the hall!!!!" Nope, those aren't words I want to ever have to say.
That's why my 870HD has a nice big Vang Comp safety. No keys for me or my family!
Safety started out with us controlling the gun-has evolved into the gun controlling us-seems a Demo thing--you know,"... couldn't have been my responsibility-had to be the bad gun-let's work on the gun!!" So many things in life are harder because of rules on top of rules that would never have been written if people just did the right thing. I'm for used guns when possible-just don't need more fidgitgadgets...
Well there's got to be some way to do that. I would say any gun smith could do it for you, but will he now that's another question.
What I was wondering does anybody know of anybody having trouble with them??
I have a new S&W airweight centennial that has the key lock. I've heard about some problems on the Smith forum, but haven't experienced any myself. I haven't shoot this thing much though. I think about 150 rounds. Just enough to make sure it goes bang and the bullets come out of the front as advertised.