You have to play a lot and get a lot of kills and rank up your guns.
Come on that was bad.
First you need to be level 20. Use hardline along with specialist. use any three perks but use them the same on EVERY specialist class you use. Then use the same perk until you get the 10,000 thousand xp (earning it 150 times). Then change 1st perk to any other one you like......
For example I used assassin, marksman, recon. (they are my favorite)
You will also get title for earning any perk 150 times.
You can also play 2v2 with friend, camp in... Erosion... The top bit with tac (if you have reached lvl 61), use pistol and get about 40-50 kills with it and you will get maximum proficiency and 10,000 xp. Keep swapping pistols when this happens and you'll rank up in no time....
I do both at same time.
ol
Boosting is cheating to rank up, basically.
Level 80.... 20 prestiges
You play the game online and rank up to open it.
CHEATERS
Your rank is dpended on standing with contacts you can rank up fast by doing the earlyer contacts because high branch contacts level up slower
i ranked up pretty fast with headquarters i rank up fast in search and destroy
you have to be rank 80 to prestige
You rank up the same speed through out all prestiges
yes because when i wasnt prestige it takes ages to prestige and rank up and when i prestige i rank up fast
Just reach rank 47.
The p99 is unlocked at rank 11 in multiplayer, but it is unlocked at rank 42 in special ops.
In the special ops, you just level up your level to like 25, and if you spend more cash, they get riot shields :D.