Vincent305 wrote:When moving at combat speed can a tank choose to shoot both its non defensive sponson weapons as its one weapson of choice? For example can a valkerie shoot both its heavy bolter sponsons once it has moved at combat speed? Can a leman russ shoot both its plasma cannon sponsons at combat speed? The rulebook states that one single weapon can shoot if a tank moves at combat speed (plus defensive weps). Does "single weapon" mean weapon slot on the tanks weapon list or a single gun on a tank model?
The posters above are correct, but to answer your questions concerning the specific vehicles you mentioned, look at page 73 concerning what can fire at what movement speeds.
Because a Valkyrie is fast, it can fire ALL weapons at combat speed. So at combat speed, assuming you had a decked out Valkyrie (who wouldnt take that) you would be able to fire your multi-laser, your 2 multiple rocket pods, and 2 sponson bolters.
Because a Leman Russ has Lumbering Behemoth, it can automatically fire its turret weapon along with one other offensive weapon plus any defensive weapons. So moving at combat speed, you would be able to automatically shoot the turret weapon, one of your sponson (or other offensive weapon of choice) and any defensive weapons.
The only reason I bring this up is due to the special circumstances that each vehicle has allowing it different firing rules.