M16a4 with grenade launcher or hologrpahic depending on map
g18 akimbo for secondary
semtex and flash
scavenger pro
stopping power pro
commando pro

one 3 round burst usually drops whoever i shot. m16 range and power owns!!!! and in cqb or comin aorund corners the g18s are unstoppable! and inever run out of ammo lol