The ER97D Destroyer is the best in the ER97 line of weapons. It is basically the ER97E model, but with 4 times more damage. There is no speed deduction just like the other rifles. It shoots large green projectiles at a low speed. It is most recommended for T.O.O.L. decimation because of its relatively low RPM and the higher damage. It is not recommended to buy this gun due to its low RPM. The Trident, although its RPM is lower, is recommended for beginners due to its wide spread shot, which can hit multiple enemies at once.