The SRS99D-S2 AM is a semi-automatic UNSC sniper rifle that fires 14.5 x 114mm APFSDS (Armor-Piercing Fin-Stabilized Discarding Sabot) from a 4-round magazine. It is designed in the conventional layout, so the magazine and operating system are located in front of the trigger. The magazine does not fit flush.
This weapon is gas-operated. The action must be cycled to chamber the first round. Once the first round is fired, the gases from the previous round forces the bolt back, seating a new round on its return forward, and continues to do so until the mag is empty. Once the mag is empty, the bolt locks back and the mag is removed. After a new magazine is inserted, the bolt catch button must be pressed which releases the bolt forward, placing a new round into the chamber. The charging handle is on the left side of the rifle - allowing the user to cycle the action without unseating the weapon - and is physically a part of the bolt, and travels during operation of the weapon
This weapon has been the UNSC long-range weapon of choice when engaging the covenant over long distances. A well placed SRS99D round can travel overr 1500 meters and pierce 13 feet of flesh and bone.
Effective Range: 1500m
Maximum Range: 2000m
Cartridge Used: 14.5x114mm APFSDS Russian