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Pick your favorite gun, then put these perks on:

-Scavenger
-Hardline
-Ninja

Equipment: Anything you want.
Special Grenades: Anything you want.

I use UMP45, M16, AUG, FAMAS, and SCAR-H with this. You can use whatever you want as long as you rack up kills with it.

Put your killstreaks as:
Care Package
Predator Missile OR Harrier Strike
Chopper Gunner OR AC130

With Hardline, it takes 1 less kill to get these streaks.
Use your gun, play tactical (not CAMP), and get kills.
With a Predator Missile hitting multiple people, you can just run over all of their bodies with Scavenger and easily finish the challenges.
(I got Scavenger Pro VI in 5-6 games, I got two of them in just one game.)

With this you will find that your K/D spread will be much higher if you get killstreaks and a LOT more ammo.

When you get Scavenger Pro, you get extra magazines! (like CoD4's Bandolier), and it is much easier to get than the FMJ Extra Mags. (I don't know if you can double them up.)

If you want to get more XP and let your K/D drop a little, die every 2-3 kills and keep getting mini-killstreaks for the Hardline Pro Challenges.

One game, I went from 43-44 with this method (and the game before I just became 43.)

Scavenger is so easy to get the challenge for. I wish I started earlier. I just started earlier today and already got to Scavenger VI.

good post ill have to try

Thanks, it is really good to use.

Thanks dude. Works pretty good.

this is a useless thread. i thought u were gonna post a "trick" or sumthin special.

nothin to see here folks, move along.

It's discussion, if it was a trick I'd post it in the glitches section...

y ninja? i dont believe it that important

Good technique but i use Magnum tactical knife, marathon pro, lightweight pro, comando pro, preditor missle, Harrier strike, and emergency air drop. but i will dry this to get my k?d over 2

he is telling you how to get xp and rank up at the same time. and this is discussion you are suppose to discuss. You want tricks go to glitch section and flame over there.

this is a gd guide, if only I hadnt already done all those challenges >.<