Resurgence is an upcoming Skaarj campaign/mod for Unreal v227. It includes new maps, weapons, enemies, and features.
During the Human-Skaarj War, the rifle was commonly modified by the more clever Skaarj snipers as a way to pick off as many hostiles as possible. Primary fire is a set of three shots in quick succession. Secondary fire is the standard rifle zoom. It's best to use this weapon either against stronger individual foes or groups of weaker enemies - once you shoot, the gun will not stop until it has fired three shots or has run out of ammo.