You can dance without a lawyer
"A democracy cannot exist as a permanent form of government. It can only exist until the majority discovers it can vote itself largess out of the public treasury." Attributed to Alexander Tytler
and since no one has been criminally shot with a 50 caliber there is absolutely no reason to ban them
and even if some criminal gangs perpetrated crimes with a 50 BMG, that is no reason to punish the law abiding.
I couldn't give a damn what undefined or unknown hand wringing ninnies desire. You don't have a Right to be free of inane fear. You have a civic right not to have someone criminally attack you or menace you. someone merely owning or using a weapon lawfully is not grounds for someone to demand a ban because they soil their garments over the mere thought that someone has a 50 BMG rifle
(17+1 is a standard for several models of fullsize 9mm semi-autos....not extreme...the norm)
And you would limit me to 10 rounds, or less? You can go to H e double hockey sticks bub. Nothing like displaying gross indifference for my safety.