68
You get it at rank 45.
By ranking up to a certain level ( i think it is rank 2 or rank 3)
just look at the level u unlock it at DUMBAZZ
You have to be a level 67...... "SORRY"...
Rank 56 its a good gun with acog on if your into urban sniping (i do this with it) two shots to the stomach will down a guy one shot to the chest and up over all its a great gun.
get to level 48 and you unlock the ACR
no
you CAN'T
Level 48
get 2500 headshots
lvl 34
level 70