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The Longbow 1S-1K (1 Shot - 1 Kill) is a MDC energy rail weapon which is constructed by the Maquis, using the reverse-engineer based on Chimeran technology.


Its magnetic accelerator launches a small iron flechette at an extremely high velocity that is accurate to up to 1000 meters. The secondary fire charged and fires multiple flechetttes at once that can pierce through multiple targets. This is one of the few weapons that can fire underwater. It is exclusive to Resistance Retribution, and it is unlocked by collecting all of the Retribution Intel. However, it is available from the start in multiplayer.


  • The 1S-1K designation derives from the weapon's ability to destroy Drones and kill Hybrids with a single shot.