Energy projector
From Halopedia, the Halo wiki
The Energy Projector is a Covenant starship-mounted weapon. It is believed to be the most devastating weapon in the Covenant arsenal, with an effective range of 100,000 kilometers - beyond the range of any UNSC weapon, including the Super Orbital Magnetic Accelerator Cannon. It fires a lance-thin, fluctuating beam of superluminal energy that spears through enemy warships at long range.
It can take down the shields of a Covenant frigate or a Covenant destroyer with a single hit. However, it can effectively neutralize a UNSC frigate or UNSC destroyer's threat to friendly forces by surgically impacting critical systems like their MAC system, destroying them and making them effectively useless in combat.
