Some frame locks are designed like this, strider comes to mind. If your lockup is solid I wouldn't worry too much about it. You'll just have to see how it wears. I'd be willing to bet that with a few hundred openings and closings the lockbar will settle in a but and that gap will disappear. As the tang and the lock bar become mated to eachother the lockup may improve. The flip side is that (like striders are known for) you may develop some vertical play, if this is the case, I'm sure benchmade will take care of you.