As engineer kill armour with the repair tool - it's really fast and devastating.
Also captured enemy vehicles are not repairable - you will destroy them even with friendly drivers in
(guess how I found that out: "here, let me help"
)MCom stations can be blasted with C4, rockets or heavy weapons. If the building's demolished, there's no cover and they're pinning you down, just blast it. Two spec ops guys can pwn an mcom station in about 5 seconds. It's dirty and will catch on quickly as a tactic - think jihad quadbikes covered in C4.
As with the repair tool tactic of course this can also be a problem - seen plenty of people "helpfully" calling in mortar stikes on mcom stations to clear out enemy thereby nuking the thing they're trying to defend. Take care shooting the big guns at enemy near mcoms.
