[quarantaseih]

Agreed. And feel free to do so in your country home.

Like the 1A, 2A isnt absolute, even conservatives say it isnt. You cant shoot guns for fun in a patio in NYC (but you should be allowed to own a mortar!). Not absolute but unconstitutionally stifled for decades.

[int_19h]

You are allowed to own a mortar in US.

You just have to pony up $200 for the mortar itself, and then $200 for each shell, to register them with ATF as destructive devices. Well, and find someone to willing to sell them for you. Or make your own.

[bell-cot]

IANAL, nor 2A case law buff...but given the Troubles of 7 February 1991 ( https://en.wikipedia.org/wiki/Downing_Street_mortar_attack ) - and much other mischief that they'd be "just the thing" for - I suspect that U.S. law enforcement could be very interested in private owners of mortars.

[int_19h]

That's partly why they set it up that way in the first place - ATF gets to review all those applications, and while they cannot reject them except for specific enumerated reasons, they can certainly investigate and/or notify other agencies.

Nevertheless, if you follow the procedure, it is legal, and rich collectors do it. Also applies to larger artillery pieces, tanks with working main gun etc.