BV- the 3rd fastener is interesting. I spent a while looking at it. There's a bolt in the top of the action that engages and locks it.
This bolt moves back and forth, in line with the bbls (instead of perpendicular with them like a Greener cross bolt). It's always contained within the action. The bolt is notched to engage the extension, and it's very stout.
It is activated by the the lever. I'm not sure how they link up, though.
The underlever is a snap-action, so it snaps into place when you close the gun and pops open when you disengage it to open the gun.
OWD
