Another unusual gun 3

[Rudyard]

Okay 1st on my list, as I don't recognize them all either,
View attachment 111230
What is this and how does it work? Where/how does the spark or fire go into the main charge?

Dial down to the lower post it explains all I hope. The flint that's fitted interchanges with the fancy hammer lock I made to alligne with the flint vent , the hollow pan being filled to form an anvil. (The lock that has the convertion parts is just a lock from store to illustrate the plan).
Regards Rudyard