I couldn't care less about the appearance of the lock - Heck! Unless you're looking for it you won't see it. Much ado about nothing...

However, when it comes to function of my daily carry, that's another thing entirely. I really have no way of knowing how frequently the locks fail. but I know one thing. That is no longer a concern of mine...

I have replaced the lock in my 642 (daily carry) with the "Plug". I feel better, don't you (LOL)...

Dale53