Defines the amount of shots this weapon can fire in succession without having to stop and reload or wait for the ROF= to pass. If set to more than 1, then each shot's origin (FLH) inverts the lateral component. For example, a Burst=2 weapon fired from a unit with PrimaryFireFLH=100,50,20 would fire two shots without stopping, and the first shot would come from 100,50,20 and the second one - from 100,-50,20. The third shot, if the weapon were to allow it, would come from 100,50,20 again. And so on.