Agree Cit, got some nice film fotage of the hurri 2D firing its guns, both at the same time.
Another thing, there is a bug in the Hurri 2D, press the trigger one time for one shot and see what happens. Usually you can do it a few time but then you start losing 3 and 4 and 5 rounds whenever you press the trigger (without holding) but you only shoot one round. Hard to explain, have film of it, not hard to do.
Try firing all 30 rounds by pressing the trigger very fast so that you only fire 1 round a time.