Canister Shell

A Canister Shell is a shell consisting of a closed metal canister typically filled with round lead or iron balls, achieving the same effect as a shotgun. They are used against enemy infantry and also prove useful when enemy infantry is targeted near a friendly armored vehicle, because the pellets cannot penetrate armor.

Battlefield 3
The Canister Shell is an upcoming vehicle specialization in Battlefield 3. The current advantages or disadvantages are not well known at the moment.