Created a sociopathic wasteland legend for a new roleplaying, DiD playthrough. His weapon of choice is the minigun, and I've been playing New Vegas for so long that I don't really recall the best way to go about getting one quickly anymore.

So, any suggestions?

http://fallout.wikia.com/wiki/The_Roach_King would propably be your best bet, or stalk some BoS members and hope they get killed

Anywhere on the mall