Sentry Railgun

This weapon fires a beam with finite travel speed. Upon impact with a target or solid block, the beam will terminate and attempt to launch up to 8 orbs spreading out in 45-degree intervals from the impact point. Both the beam and the orbs deal a mixture of fire and energy damage.

The "Decoy Drones" referenced in the alt fire mode is slightly a misnomer. While the drones will often draw enemy aggro away from the player, each drone also has a laser weapon that it can use to deal a small amount of physical damage. The drones seem to have unlimited health, but limited lifespan; keeping the alt fire pressed at all times will result in roughly 15 to 18 drones being active at any given time.