ALI-50 110mm autocannon
From Halopedia, the Halo wiki
The 110mm rotary cannon[1] is a space-to-space projectile weapon mounted on the UNSC C709 Longsword Starfighter.
It is unclear what type of ammunition that is used but it is most likely that the shells are made of Depleted Uranium.
References
- ^ Halo: First Strike, pg 38
