When you first play, you must use default classes until you level up to Level 3 (I think). This is when you unlock custom classes, and you start with the m4a1
Level 48
Yes, there is online multiplayer on Call of Duty 4: Modern Warfare.
yes u can They also have Call of Duty World at War, Call of Duty Modern Warfare, Call of Duty Black Ops (release date 11 20 10), and Call of Duty 3
Call of Duty: Modern Warfare 2.
Modern Warfare 2 will be released on November 10, 2009. It is the sequel to Call of Duty 4: Modern Warfare and it is the 6th game in the Call of Duty series.
how do you unlock Municion viva on call of duty modern warfare mobilized
Do the challenge "Ultimate Sacrifice" which you unlock be nuking the enemy while you are losing
ak47
Level 48
You unlock it by getting to 10th Prestige.
well call of duty and modern warfare are the same it is called Call of Duty: Modern warfare and then came call of duty: modern warfare 2
you can unlock it with you're first killstreak award unlock
Unlock the challenges for them.
2nd prestige
Level 22 :)
cmplete challanges
You get it all at a certain level