Yeah I've been using the MP5, got my RPD back now so can at least get some kills with that, but working on silencer for MP5 for S and D.
It's funny at level 55 though when the final elite challenges are unlocked, 1 game of shipment gets you like 1500xp just in challenges
Cool, it also seems like just as you get frag 3 you are losing it
Used it for the last time this morning, until another 40 odd levels.