From DownSights: “The majority of the players run an SMG as a secondary when using their overkill class to tackle Close Quarter Combat (CQC) situations – having either an MP7 or an MP5 in your back pocket with a Sniper Rifle or an AR as your primary has always been the meta of the game.
That is, until recently. Now the meta secondary has switched in favour of a shotgun. And not just any shotgun, but the R9-0 Shotgun all thanks to the new Dragon’s Breath Rounds added to it.
Adding the Dragon’s Breath Round on the R9-0 Shotgun turns it into an OP weapon that can two-shot kill an enemy at close range. This might not have a range and fire rate of a regular SMG, but it is still a viable weapon for CQCs, especially when inside the buildings.”
Source: N4G PC R9-0 Shotgun – OP Loadout for Warzone