AC/20 dmg 20.00 heat 6.00 cooldown 4.00
Cooldown drop to 3.80 with fast fire.
Double AC/20 is 40 damage pinpoint every 4sec.
I believe the internal structure is 50% of the total possible armor hit points in that section. So if you have 50 points in your CT between your back and front, you'd have 25 internal structure. Correct me if Im wrong.
With perfect aim, always aiming at the center torso, assuming all the back armor have been put on the front and they are completly undamaged(we all know that is never the case) you can kill mechs in;
Commando => 48 => 2 shots = 8 seconds.
spider => 60 => 2 shots = 8 seconds.
jenner => 66 => 2 shots = 8 seconds.
raven => 66 => 2 shots = 8 seconds.
cicada => 68 => 2 shots = 8 seconds.
blackjack => 84 => 3 shots = 12 seconds.
centurion => 96 => 3 shots = 12 seconds.
hunchback => 96 => 3 shots = 12 seconds.
trebuchet => 95 => 3 shots = 12 seconds.
dragon => 120 => 3 shots = 12 seconds.
catapult => 126 => 4 shots = 16 seconds.
jagermech => 126 => 4 shots = 16 seconds.
catafphract => 132 => 4 shots = 16 seconds.
awesome => 150 => 4 shots = 16 seconds.
stalker => 162 => 5 shots = 20 seconds.
highlander => 174 => 5 shots = 20 seconds.
stalker => 186 => 5 shots = 20 seconds.
Thats definatly broken, considering the ease to fire that gun with pinpoint accuracy. Of course catching a light is not as easy, but really, the problem is not lying there.