From Halopedia, the Halo wiki
- The Sniper Rifle System 99 Anti-Matériel is adopted by all branches of the UNSC Armed Forces because of its modularity and ongoing manufacturer support.
- Production of the M99 Stanchion presumably ends, though the rifle remains in service within the UNSC to some extent.
- ^ Bungie.net: Sniper Rifle System 99
- ^ Halo Graphic Novel, page 122
- ^ Halo: Contact Harvest, page 16