Make it illegal
As I said in my post on Weapons III, I'm a firm believer in the second amendment. So long as they get the proper training, get a background check, and abide by other such laws, I'm fine with them having one.
Miniguns are cool, but also so ludicrously expensive that they aren't much of a threat.
I'd love to own every weapon on every video game. Could someone please tell me where I can get every weapon on every video game?
Who said anything about needing one? Just because you can drive a car over the speed limit won't mean you will. Same applies to weaponry (Which isn't even weaponry until used as such).
Who the hell needs a minigun?!
A minigun would be more of a con than a benefit. Also, I believe it is far too dangerous as a weapon to be used by civilians.
Wait. A Gatling "minigun"? What on Earth do you intend to defend from with that? Oh wait. I understand if you're a revolutionary and "defending" is not at the top of your agenda.