GA-TL1 Longsword
From Halopedia, the Halo wiki
The Longsword is the main UNSC fighter bomber. It is capable of functioning in space and its engines are capable of reaching the Earth's and Installation 4's escape velocity. The Master Chief and Cortana use a Longsword to escape the destruction of Installation 04.
Its main weapons are 110mm rotary cannons for dogfighting in space. This versatile fighter can be armed with an assortment of secondary weapons including ASGM-10 Missiles, bombs, mines, and even a single Shiva nuclear Warhead. The Longsword is usually deployed against Seraph Fighters. It also can escort Pelicans as they head for the surface of the planet. It is a multi-role aircraft.
Longswords could possably be the version of the strike bomber that Bungie had to go with.
