A heavier twin-barrel cannon turret based on the tank with configurable HP, range, cooldown, and arc. 8-way placeable (like a railgun), changes color by player, and can hit and damage asteroids.
Not sure if it's an interaction from a different mod, but I don't think so. But when in space, it keeps rotating away from the front and towards the sides (chasing asteroids) until it's facing almost 180 degrees backward and fires into the belt, feeding it ammo.