my great uncle owned an armored car when I was a child. He lived a few states away so I only saw pictures. British Ferret. Apparently it still had the guns, but they were spiked, so they would never fire again.

Also, he tried to explain how you shift, but I never quite understood it. the clutch was a lever, with some sort of handle to spin the flywheel up or down to the next gear.

Most privately owned tanks have demilitarized guns, though I think not all. But with the right paperwork in America, it should be legal to put working artillery in your legally owned tank. There is a fair bit of working artillery privately owned in America already, but you'd have to find a gun that is compatible with installation on your tank.

Of course this is not a cheap hobby, and if you want explosive shells you'd need to do paperwork for each shell. Even if you only want to fire inert projectiles, it's not as though you can buy those at walmart.

Here is a place in Texas where you can rent a tank, drive it, and shoot it: https://www.drivetanks.com/

Here are the prices for the Sherman tank:

SHERMAN TANK

$1,850.00 – Drive the tank

$950.00 – Ride the tank, driven by a Cadre

$2,800.00 – Drive & Shoot the tanks 76mm main gun (1 round)

Here is a guy who rented a tank and shot it: https://www.youtube.com/watch?v=iqC2kJNdJjE