No you can only have a blue, red, and yellow perk and 1 death streak
before the match choose your perks, then they are automatically set on for the game
You get 4 perks when you unlock your classes at lvl 4. you get 3 perks for your weapon and 1 perk for your deathstreak.
Stopping power, hardline, cold blooded and lightweight
The Explanation will take too long so please follow the link below. That website will answer all you mw2 questions. http://www.themodernwarfare2.com/mw2/multiplayer/perks/
Marathon, bling, sleight of hand, and one man army
Your only able to have 3 perks per class, however if you get into a modded lobby you can leave with up to 4-5 total perks per class.
i no a couple there is cold-blooded pro scavange pro marothon pro and a couple others
Stun and kill them at the same time at least 20 times :)
model 1887 akimbo and rangers akimbo
P90 Akimbo (Primary) M93 Akimbo (Secondary)
Handguns, Machine Pistols, Shotguns, and Launchers
CoD MW2 Way better graphics and extremely well thought perks.