From Halopedia, the Halo wiki
The pulse rifle is a San'Shyuum weapon used in 860 BCE. The Steward that accompanied Mken 'Scre'ah'ben during the Skirmish of the Planet of Blue and Red was equipped with a pulse rifle. When they were attacked by Sangheili forces, the steward managed to fire off a couple of shots before he was incinerated.
List of appearances
- Halo: Broken Circle (First appearance)
- Halo: Broken Circle, page 1
- Halo: Broken Circle, page 10