I've had the good fortune to having handled & shot many firearms over my life. Some were rare or unusual.
As Cholo mentioned,, the curved stocked .22 that Amanda brought here long ago,, as well as her Dad's (Bob) early Colt SAA.
I was allowed to be among a few of us who were allowed to shoot a 1927, overstamped 1928 LEO Thompson in full auto. The guy how had that one was the second owner. He'd gotten it directly from the LEO agency. Still had the LEO Agency brass plate on the stock.
And I've managed to fire several odd & older military full auto machine guns when attending a machine gun shoot. Reising, MG42, Sten, & others there.
Then there was the one time I was allowed to shoot a Pedersolli shotgun, that was a "one of" custom.
These are but a few I can recall off the top of my head.