>>6077926No, I sprayed some matte topcoat, it did the trick.
I'm using tamiya stuff.
The two different blacks are because some parts were either sprayed with black (barrels) or paintbrushed (some parts of the "core"), when topcoated the difference between painted and non painted looks nice.
Also, I could suggest you to use a gun-metal can (didn't use it on the minigun, but you can see it in some of the guns here), it gives a really nice touch.