Level 4
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Its automatically unlocked. Its a preset LMG and is customizable at level 4 when you unlock custom classes.
level 4. Private First Class.
It all depends how you play. I would recommend putting a Javelin on most of your classes, but mostly just try different classes and see what works best for you.
if u mean what level u have to be to prestige in mw2 the answer is level 70
7
When starting the game, you are given three default classes, Grenadier, First Recon, and Overwatch. Once you reach level three, you are given Scout Sniper and Riot Control. At level 4 you are given 5 classes in which you can customize with the equipment you have unlcoked. Once you reach prestige ten, there are ten customizable classes.
to unlock the stinger missle in mw2 you must be level 30 or sergent major II
Reach Prestige 1 and Level 69.
Level 70, which is the level cap.
commander
you swap classes faster