7.62x54mmR

The 7.62x54mmR, also known as the 7.62x54mm rifle cartridge, is a form of ammunition that was created by Russia, dating back to the Russian Empire. It had a bottleneck-type design and was among the oldest ammunition to still be in use in armed services, being used as the standard ammunition for the Mosin-Nagant as well as the PK/PKM machine gun and the SVD.

Soviet Union
During the Virtuous Mission and Operation Snake Eater, various KGB and GRU soldiers, respectively, utilized the 7.62x54mmR round for their SVDs. Aside from this, the GRU Colonel Yevgeny Borisovitch Volgin wore an entire bandoleer of 7.62x54mmR rounds across his chest, which he used as an instant source of ammunition for when he wished to use his electrokinetic abilities to set off bullets at an enemy, and partly also as makeshift brass knuckles. However, late into the mission, his wearing the bandoleers backfired on him immensely when he ended up hit by a bolt of lightning and set on fire as a result, causing the bullets to be set off and fire into Volgin, injuring him significantly enough that he was left braindead. These rounds were still embedded into Volgin after he became the Man on Fire largely because of his desire for vengeance, giving him a more demonic visage as a result.

America
Aside from Naked Snake utilizing 7.62x54mmR ammo during Operation Snake Eater, the FOX soldiers led by Gene occasionally used them during an alert during the San Hieronymo Incident.

Peace Sentinel utilized these rounds due to using the PKM machine gun and SVD rifles. The MSF also utilized these rounds after procuring the weapons themselves.

South America
During the 2014 Guns of the Patriots Incident, the South American rebel soldiers frequently used these rounds, largely because of their using the SVD and PK rifles.