Proscaline has a great guide about the actual weapon so I will not cover that, instead my guide will focus on a quick way to get the 25 kills with the weapon.
I found an easy way to achieve this is to play Conquest large
on the map downtown
, for this method to work your team needs to have captured point C
. Once you have captured C
, use the T62 and guard the elevators, taking out any enemies that try to come up. Below is a game clip showing this technique.
Using this technique I got the 25 kills halfway through my second game on the map. I hope this helps