Stick a foregrip and heavy barrel on it; almost all of the recoil will be vertical and fairly easy to control, and will fire as accurately as an assault rifle.
I did use the RPK last time I played and let me say that the RPK is choice now, after the patch. I feel like the support class is feeling the effects of the patch for me. I liked to use the M27 or MG36 and use them as a big AR and now the foregrip nerf kills that playstyle for the most part.