I use the M4 + red dot sight + grenade launcher.
Claymore
Stun Grenade
Bling
Cold Blooded
Ninja
I don't do great but I do OK. Will switch to the M16 at level 40. Currently at 38.
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Jimmy
Team B.O.B.™ - Ballaz on a Budget
R.I.P Huan Vo 11-19-2008