Is it an energy projector? Going by the description in the books it looks identical to what was described.
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According to the Spartan introductory booklet [i]Infinity[/i] is armed with the following: CR-03, Series-8 MAC (4) M42 Archer (350 Pods x 24 Missiles) M75 Rapier (250 Pods x 30 Missiles) M96 Howler (500 Pods x 20 Missiles) PDS (830 guns, 70mm M965 PDN0 This is the most up to date armament list for the [i]Infinity[/i] seeing as Gabriel Thorne has only just been assigned to the ship six months after the campaign ends.