Since we've had a discussion about the .45 Colt ctg in the Winchester, I thought I'd bring up the subject of Springfield trapdoor pistols. Every now and then--not very often, but occasionally--you'll see, at a gun show, what appears to be a pistol with the Springfield trapdoor action. It'll have the US markings on the lock plate. It will be very expensive.
It's also a fake.
Thre is one authenticated trapdoor pistol. It's chambered for the same .50 cal ctg the old Remington single-shot pistol was chambered for. It was made at Springfield Armory & its production is supported by Armory records. That pistol is in the arms museum at USMA at West Point, NY. Later, a 2nd pistol, same chambering, same markings, but not supported by Armory records, turned up. Last I heard it was in the Flayderman collection. These are the only 2 actual trapdoor pistols known to exist.
Back in the 1920s thru the early '50s Hollywood made a lot of swashbucklers--swords & muzzle-loaders, costume pieces. They also had on hand a lot of Springfield infantry rifles, & of course Hollywood has always liked the cavalry better than the infantry for movies. A lot of those rifles were cut down, restocked as pistols, & dressed up with brass furniture, fake frizzens, & a bunch else to 'look like' muzzle-loading flinters. It takes a while to load a muzzle-stuffer, even with a blank. When the director wanted a lot of shooting, the extras & bt-part guys got the converted Springfields & a pocket full of 5-in-1 blanks. They stayed in the background while the stars got the actual period guns. A lot of these things grew legs & walked away from prop-rooms, & they're what turns up at gun shows as 'original Springfield trap-door pistols.'