Auto Loader

The Auto Loader is a vehicle specialization set to appear in Battlefield 3. In real life, an autoloader is a type of breech used by some cannon, automatically cycling empty cases out of the chamber and new rounds in. Many modern main battle tanks make use of autoloaders of some kind, although they are considered to be more dangerous than their older predecessors.

Battlefield 3
It is likely to be equivalent with the vehicle reload improvement specialization that was present in Bad Company 2, increasing fire rate, although nothing definitive known about it.