So what do the engineer's antitank weapons do? First, they have the same effect on the heavy and the light tank, and each type of tank takes the same amount of damage. No, seriously. All numbers below are "square on" numbers, where the shot hits the tank's armor dead-on:
· RPG-7: 28% damage when hitting the front (always, angle doesn't matter), 57% maximum (and 28% minimum) when hitting the side or rear, angle matters.
· M2 Carl Gustav: 22% damage when hitting the front, 44% maximum to side or rear.
· M136 AT-4: 33%/66%.
· Stationary BGM71 TOW antitank weapon: 57% to front, instant kill the maximum shot on side or rear (so call it 114%).
The EXPLMK2 specialization is said to increase damage of soldier antitank weapons by 25%. Vehicle Armor upgrade reduces damage by 25%. Generally, most of the specializations appear to be +25% or -25% in the right way.
Firing at the gap between the turret and body doesn't seem to increase damage (jury is still out). There's rumored to be a special spot on the back that gives a lot of damage, but I have not found such a place in testing so far (I can't disprove the existence of unicorns, either). Shooting the treads doesn't appear to do any extra damage, unlike in Battlefield 2.
Grenades: armor doesn't matter, just get it close to the tank. Fragmentation and the 40 mm do the same, 6% or less. Note that the 40mm "shot" grenade needs to go a minimum distance to blow up; too close and it doesn't, probably as an anti-suicide mechanism.
C4: position matters, armor is irrelevant. Put it in the center of the side of the tank and it takes only one charge to blow the tank. Put it on the front or the rear (!) of the tank and it does only 69% damage.
Mortar: if the mortar is called directly on the tank and the tank just sits there, the tank is always destroyed. The improved demolitions specialty does not increase mortar damage.
Mines: do 69% damage on a heavy tank, 97% on a Bradley. Engineers can deploy up to 6 mines total; if the 7th is deployed, the 1st disappears, etc. Mines apparently last forever while the player is playing, even if he switches teams. Mines can be blown up by shooting at them; the engineer has to be a safe distance away to do so, but anyone else can at any distance.
Tank on tank: 30% front, 52% sides and rear. The hardened steel warheads specialty raises this to 35% and 67%.
Bradley gun vs. tank: the six shots produce 14% total damage (2.3% damage each) to the front, 28% sides and rear. Note that the Bradley does use a clip of 6 shots, only when the last is fired does it reload.
The people I made a bet that it couldn't be one shot by a missle are still claiming TOW can.
I swear those did alot less damage.
you can take a tank down with 1 pull of the trigger with C4; requires 2 or 3 sticks though (don't recall which it is...been a while since i've played BC2). taking down a tank with C4 is one of the more enjoyable feats in BC2
I'm partial to repair drilling enemy vehicles to death...feels so ridiculous yet satisfying.
Also I'll vouch that sometimes you can be 1-shotted by the UAV. Scares the living crap out of me every time it happens.
I love doing that, then repair tooling the driver or gunner who hops out.