Hey everyone, again thanks to all who helped on my last question about this gun, got a new one. The breecblock has a pivoting part on its top that is somehow connected to the firing pin. If no shell is in the chamber and you push on the firing pin sticking out the back of the block this little lever?? sticks up, if the firing pin is in the block this lever ?? is flush with the block top. My gunsmith didn't know what it is and I really don't see what it could be for. I've looked up Rollingblocks and have never seen this on any pictures. Any ideas?? Thanks, Peter