My guess for MW3 factions.

Playable-Rangers, TF141 and russian exiles.

Allied-Navy seals, USMC, US air force.

Enemy-Zakhaev's executioner, Shadow company, Spetsnaz, Opfor

weapons in game (my guess)

Ak-47, PM, Dragunov, M4, M16a4, M9, M1911.45, M67, Scar-h, AK-74,FAMAS, AKs-74u, Saiga-12

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