Arc Claw is just +1 S and Haywire at Ap5, so as I suspected.Cognis flamer always does D3 in overwatch, ok I guess. Otherwise Str4 Ap 5 assault 1...meh
Heavy Arc Rifle is 2 shots, str 6 haywire.
Heavy grav cannon is salvo 4/6 so not bad...I don't see the point of making it Salvo if the only unit that can take it always counts as stationary though :/
The Hydraulic Claw is +2 str and it looks like it double the models attacks to a max of 10 (why add that?) it's cut off so I dunno, not sure if it doubles the charge attacks too, but it's cumbersome :/
Phosphor Blaster is 24" (called it!) rapid fire str 5 ap 4 and lumagen. Nothing too surprising
The plasma culverine is heavy 2 blast! So as I had hoped it is just a 2 shot plasma cannon, 6 plasma blasts from an MSU is pretty damn good actually especially if you take them with the ignore cover formation.
I can't make out the Torsion Cannon...str 8 ap 1 obviously. It looks like it does D3 wounds or HP instead of 1 though so that's actually pretty awesome.