Found this at a small local show today. The seller thought it was a .223 snap cap but when I got it home, I found that there is an inner piece that slides out of the base. This inner piece has an o-ring to keep it from falling free and a protrusion on the end that must act to transfer the impact from the firing pin to the rimfire cartridge. There’s an internal chamber in the larger cartridge shaped piece that seems made for a 22 RF. Has anyone seen one like this and if so, who made them?
New IAA Member