The Slow Beam is an equippable Assist item in Metroid Prime: Federation Force. When fired by a Federation Marine, it slows down a target's movement. The more fire that the enemy takes, the slower they move. The Enhanced Slow MOD increases the length of time an enemy is slowed down, while the Arcing Slow Beam allows its effects to be chained between up to 5 enemies. "A beam that slows a target's movement with prolonged contact."