Yes, that is interesting! On #46, the bite does not pierce the extension. Wonder why the change between these two guns? Gun makers whimsy or deliberate design improvement? Does your gun have firing pin springs? I have a Boss 16 ga. hammer gun with the Purdey 2'nd patent thumb lever and really like this kind of opener...just nifty neat design. Hope you enjoy using your Abbey as much as I'm enjoying mine. Weather permitting, I'll have #46 out for clays again tomorrow.