I’d like to see secondary ammo on weapons (like compressed air for flamethrowers, pneumonics) before a minigun shows up. Although I guess you could always power it off UPS if it’s mounted and you don’t hook a battery into the frame.
edit ; forgot to say, of course I think it should be mounted-only like the M2. It’d be silly otherwise.
double edit ; since the minigun uses .308 and has a stupidly high rate of fire, making it the slightest bit usable without severely overstocking .308 hunting rifle ammo would be challenging. Although if it goes in I expect the devs to leave it just as ridiculously impractical as it’d be irl.