Whiskey 101,
It looks like the one in picture #1. If I understand you correctly, I tap toward the muzzle or toward the receiver. I'll look at it again. its my neighbor's gun and I'll have to stop over.
The other option I was thinking about was to carefully cut it in half, using a dremel. It is actually raised, so I think would avoid scracthing the barrel. My concern was that they soldered it in place. But it sounds like it is not.
I'll look at it tomorrow and get back with you.
I appreciate your help very much!