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2521 was a year in the 2520s in the 26th century.
Events
Unknown
- 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.[1][2]
Sources
- ^ Halo.Bungie.Net - Project, Halo: Reach, Intel, Ordnance, Sniper Rifle (Retrieved on Oct 28, 2020) [archive]
- ^ Halo: The Essential Visual Guide, page 179 (Sniper Rifle)