Sniper Rifle System 99 Anti-Matériel

The Sniper Rifle System 99 Anti-Matériel is a United Nations Space Command firearm.

Background
The SRS99 first entered service with the Army in 2460. Because of its modularity and ongoing manufacturer support, the SRS99 was adopted by all branches in 2521.

Design Details
It is a gas-operated rifle, firing 14.5x114mm ammunition. Also, unlike most other models, this variant features a thumbhole stock, whereas other models feature a pistol grip.

Trivia

 * The SRS99 utilizes a sling mount, unlike its successors.
 * The SRS99's scope is similar to the SRS99D-S2 AM's scope, with green outlines of objects. It will also show the ID of SPARTAN-B312, "ID-NOBLE6," no matter who wields it. There is also a small UNSC logo on the left of the scope.