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1 definition by EMR-22

 
1.
ACR
A firearm that every nerd on the planet believes is the best weapon ever made because of MW2. The reality is that it will NEVER see military adoption because of its inferior durability and design to weapons already in use. It is chambered in 5.56x45mm NATO and is manufactured by Remington Defense and Bushmaster.
Loser: "dude the ACR is the best gun in the world! I pwn in cod with it!"

Firearms Expert: shoots Loser with a real HK-416, a superior weapon system
by EMR-22 November 10, 2012