Artillery wagon - Factorio Wiki

The <b>artillery wagon</b> is an end-game wagon mounting a rail cannon that can be added to a train. It fires artillery shells, relatively slow-moving projectiles that explore chunks of terrain they travel across. The wagon gun has both automatic and manual (even longer-ranged) firing modes. Projectiles have sufficient damage to destroy spawners and any type of worm with a single hit, and have a modest area of effect. Infinitely-stacking research upgrades are available for range and firing speed, but not damage.

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