This a poor excuse for an energy weapon. This garage-rate rifle has terrible accuracy and it doesn't even fire very fast. But any energy weapon is better than no energy weapon at all.
It's a very good weapon for all Chapter 2.
The weapon uses a raygun shot. It's very accurate and burns (by electrical burn) the target with radius contact. With the skill Energy Charge, you can charge it for the equivalent of three rays for three times more damage and ammunition.