Nice find. I helped tear an old bowling alley apart, we found dozens of cone top beer cans in one wall. Keep looking, never know what you'll find. Does the building have any cool hardware, i.e., doorknobs, window latches, etc?
Kilgore made a plastic gripped model in the post-war period:
and it's a zinc alloy or pot metal guy.
Here's part of a timeline from the inimitable Dr. Toy: "1886
The first BB gun is created.�Made for children, it scares many parents because it is actually a working gun that can cause injury.�The BB gun is a descendant of the cap gun, which was invented soon after the Civil War, when some shotgun manufacturers converted their factories to make toys.�Penny pistols and other authentic looking toy guns also began to appear in the 1880s."
bombboy, your link is exactly like the gun I found! Except mine needs a good cleaning to remove the rust. I didn't want to ruin it so I haven't tried cleaning it at all. And yes, it had hand wrought latches and strap hinges in the house and barn. I sold all the early 6 over 6 windows and two board doors. Right now we're taking the hand hewn beams out. It was the original farmhouse for our property, been in my husband's family forever. Small part was built in 1740 and additions in 1830 & 1850. It's pretty much all original but has been empty for 10 years and is past the point of fixing, so we're salvaging what we can. The original privy is still there but we're waiting to dig until the brush dies off.