go to the rock ledge in one of the maps and shoot three times in the air.
how do you unlock Municion viva on call of duty modern warfare mobilized
You unlock it by getting to 10th Prestige.
you can unlock it with you're first killstreak award unlock
Level 48
ak47
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
Unlock the challenges for them.
You get it all at a certain level
lv.70
Level 22 :)
cmplete challanges
2nd prestige