No, I don't use them. I do have ONE gun that has one, a Ruger New Vaquero. I have never used the lock, nor have I drilled out the hole in the grip so it can be used (without taking off the grip panel). As far as that one is concerned, I don't see a keyhole, the lock isn't there...
I guess it would make sense for some people & situations.
I've been chasing this around in my head for years now, and I still cannot find a situation where using a lock on a gun makes any sense.
Seems stupid to me, to lock a loaded gun. DOUBLE stupid to use a trigger lock, and dangerous, besides. The only thing an internal lock gets you is not risking pulling the trigger.
If its risky to leave it loaded, unload it. Or lock the loaded gun inside something. The time needed to open secure storage is very low, with the right kind of safe, less time than it takes to load a revolver with loose rounds, I think...
people have made the argument about it being quicker to unlock the gun (itself) than get it from a safe storage. I don't see that. To unlock the gun itself, you need an itty bitty key, right? Where is that key when you need it in a hurry? On a key ring with 8 other keys? In the drawer with the gun?
eek
personally, under extreme stress (and needing a gun "right now" is in that category for me) I think I would be able to load an empty gun faster and more surely than finding a key, and getting it in that little hole...especially in the dark...
If you have though of a situation where having a loaded locked gun is actually better than having the gun unloaded or having the loaded gun locked in something, I'll happily listen...