A guy I knew ( deceased now ) built a unique rifle. It looked like a fine Kentucky rifle with a flintlock,ramrod ect.
What it really was , a 22 rimfire semi auto rifle. He took a Browning ATD rifle and built a look a like full stock muzzleloader around it. To load it you lifted the butt plate up and underneath was the magazine for the 22's.
The barrel was completely concealed inside the octagon faux muzzleloader barrel and about the only thing that would ever give away that it might not be a muzzleloader was it had a small ejection port on the bottom of the stock ahead of the triggerguard.
This man was a real craftsman and made everything on the rifle himself, stock, patchbox, buttplate, lock ect. it was really a beautiful rifle.
I never heard where the rifle went to when he passed away , but someone out there has a real treasure.
One other rifle that I seen and actually had my paws on was a 700 Nitro Exspress double rifle built by Holland & Holland. It was a special order gun and took more than 10 years to be built from the time it was ordered. Jaquas Guns of Findlay , Ohio had it for quite a while before it sold, It came in a huge burl wood display case that looked like a very fine coffin with a glass top.
This has been over 10 years ago that they had it and the asking price back then was $ 270000.00
Yes thats right Two hundred seventy grand ! The 700 N.E. ammo was more than $ 100.00 a round at the time. Jed