My KDR is 1.8 right now, last few games of metro I've played I've preemtively set it up and ended up racking up 20 kills in a life and like 10,000 points in suppression assists
It's good on Metro (Conquest I presume?) but maps with wide open areas (Caspian border, Firestorm) will probably require a steadier gun. It can be done though, you'd have to shoot in bursts, but this gives the enemy time to get out of the way.
Even with a bipod it'll get useless at range really.
But if you want to use it, don't hesitate.