oh i know bout the cross hairs and using them to quickscope. But i play hardcore so no crosshairs. Ive been practicing with dual weild weapons and am starting to get good with the cz75. Havent attached the dual wield with my sub machine gun yet as i like having an accurate weapon as my primary.

my main combo is:
Primary: Commando w/ dual mag for quicker reload or grenade launcher (gold of course)
secondary: CZ75 w/ dual wield

Flash bang, Frag Grenade, Claymore

Hardline, Sleight of Hand, Hacker (all pro)