ACR stands for Adaptive Combat Rifle, it is a Assault Rifle which is produced by Bushmaster and Remington Arms.
It can be compared with the FN-Scar, and the H&K XM8.
It is also the weapon with the lowest recoil and highest damage in Modern Warfare 2.
Dude you just pwned the other Team! Can you tell me how to do that?
ACR for teh win! Lulz
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