The Sentinel Beam is a Forerunner Directed Energy Weapon. Sentinel Beams are often integrated into the Sentinels from where the weapons take their name. The weapon is particularly effective against small Flood outbreaks and energy shields. The Sentinel Beam was designed to contain and destroy small flood outbreaks. Even though the weapons is integrated into the Sentinel's endostructure, it contains a secondary power source independent of the Sentinel and allows someone to salvage and use it if intact. The weapon projects a yellow-orange or blue beam of energy (reserved to the advanced Sentinel Majors), which is capable of effectively cutting through organic matter such as unarmored hordes of Flood -- Infection Forms in particular.