You're referring to Battlefield 3's "Black Box" achievement!
Here are some helpful tips to get you started: Battlefield.3-Black.Box
For those who might not know, "Black Box" is a challenging achievement in Battlefield 3 that requires players to destroy 10 enemy vehicles in a single match using only the M2 .50cal machine gun mounted on certain vehicles. You're referring to Battlefield 3's "Black Box" achievement
You're referring to Battlefield 3's "Black Box" achievement!
Here are some helpful tips to get you started:
For those who might not know, "Black Box" is a challenging achievement in Battlefield 3 that requires players to destroy 10 enemy vehicles in a single match using only the M2 .50cal machine gun mounted on certain vehicles.