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.
No you can only have a blue, red, and yellow perk and 1 death streak
i no a couple there is cold-blooded pro scavange pro marothon pro and a couple others
i like the UMP 45 and spaz 12 Perks Marathon stopping power steady aim Thats what i use The ump is over powered
to use perks in call of duty u just set up your class with the perks you want and you will automatically be using them, perks or not activated they are continuous.
CoD MW2 Way better graphics and extremely well thought perks.
both of them are amazing games. mw2 has better multiplayer but the campaign might be a bit confusing without mw1. mw2 is a better game but just get both .
F2000 Thermal + Heartbeat Sencor, AA12 Silencer + Extended Mags Perks: Bling Pro Hardline Pro Scrambler Pro