SRS99-S7 AM sniper rifle
From Halopedia, the Halo wiki
The Sniper Rifle System 99-Series 7 Anti-Matériel (SRS99-S7 AM), also named the S7 Sniper, is a gas-operated anti-materiél sniper rifle used by the United Nations Space Command, part of the widely-used SRS99 series of weapons manufactured by Misriah Armory.
The SRS99-S7 AM is a semi-automatic, gas-operated sniper rifle that fires 14.5×114mm rounds. In appearance, the SRS99-S7 AM bears great similarity to the SRS99-S5 AM sniper rifle, with the scope being similar to the one used by the SRS99-AM sniper rifle.
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