You have to get 500 kills for the silver title, 1000 kills for the emblem (silver) 2500 kills for the White skull title, 250 headshots for the silver title with a headshot emblem in it, 1000 for the gold emblem or 2500 for the Gold skull emblem. This is for Submarine, Assault and Light Machine guns other weapons may vary but just look it up in the challenges section. Hope this helps :)
you have to redeem 50 of your teammates
ak47
The ACR or the AK-47 they are excellent
It depends on what are you good with.
7th presitge
You get the title "sky commander".
Like with any gun title, you must unlock all the attachments for it.
modern warfare 2
Get 50 kills with a Sentry Gun. but you have to be prestiged
Yes the Full title is Call of Duty Modern Warfare 2 and it is often called MW2 or Modern Warfare 2
no
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you have to be level 29
i still dnt no
well you have to get all the kills with it under the mastery and that's like a bunch of kills the n you get it. it takes a lot of time
No, but you can Choose your Camo, and attachments
Its an assault gun