Just got my last bloodthirsty with the MK, now just 100 more kills with no attatchments.
scar h is so beast with select fire and suppressor
bloodthirsties are by far the hardest with the snipers rifles, imo. you're either put into situations where you're useless or killed by something you can't possibly fight with just a sniper.
FMG
I hate how the HAMR does that burst thing when you shoot. I usually shoot in bursts, so I waste tons of ammo and get thrown off-target by the recoil.