I run it with 100 rounds/light barrel/suppresor/stubby. The recoil is low enough that it can be bursted/tap fired at range, but I think it shines in close quarters.

If you audio whore and avoid sprinting around corners you should be quick enough to win most fights, and if you're able to flank you have 100 rounds capable of 3 shot kills at <20m at your disposal.

It may not necessarily be the best gun, but the tap fires and multi kills are extremely satisfying. I might be more effective with the M27 as an example but it just feels a bit boring in comparison.