Ran around with this for a few rounds. It generally goes pretty bad when you get pressured, but if you can get to a rooftop or just chill in cover, its nice to not have to wait for the rechamber time.
FJX Imperium: Spiritfire suppressor, Fahrenheit 29 barrel, FJX kilo-tac stock, VLK LZR, high velocity rounds
HDR: Blandwell 7x scope, gain-twist barrel, fast mag 1, quickdraw grip, overpressured rounds