ALI-50 110mm autocannon

The 110mm rotary cannon is a projectile weapon utilized by the UNSC's GA-TL1 Longsword, specifically its C709 variant. It is essentially a large Gatling gun that fires 110mm shells and is used to engage enemy fighters and starships.

Trivia
According to Robert McLees, the concept of "110mm rotary cannons in fighter/bombers", as stated in the the Halo Story Bible, is "bad crazy"; this seems to imply that the weapon's high caliber is the result of a typographical error. However, the number remains unchanged in the 2010 edition of Halo: First Strike, and its validity is reinforced in Halo: The Essential Visual Guide, which states the C709 variant of the Longsword is equipped with a "heavy rotary cannon".

List of appearances

 * Halo: First Strike