These are .22 caliber "Parlor Pistols" designed to be shot inside your living room. They came in a boxed set of 2. A novelty piece, without rifling (in other words a smooth bore), and were popular in the mid-late 1800's. Take #11 percussion caps I believe and use very few grains of BLACK POWDER.
Sorry I'm late to the party---I've been a little busy lately, lol!
It hasn’t changed. It’s still the same as it has been for many years. People are taking a chance that what they’re doing will be good enough, even though it’s different from what is currently required.