Several years ago i acquired some Borcock air cartridge guns at the time you could just buy them.
Then the government in the infinite wisdom made it so you had to have them on an FAC which is what we did.
The real question is;
Can i sell them?
And what are they worth?
I have a 7 shot Winchester repeater
3 x Colt Peacemakers
All are original 18whatevers just with the cylinders and barrels changed.