This is my attempt at roughing out a lever style latch. The lug and 'bite' will be sandwiched between two semi-circular steel 'wedges' soldered between the barrels. I broke my bandsaw blade and still waiting for my new blade nearly 3 weeks now....what service! Lever releases, known as Rigby style, Harvey Grip, Lefaucheaux, Grip forend, have lots of pics showing beautifully engraved levers, but, I've found only one pic that shows something of the mechanics.