Age of Atom
Action: Gas operated, closed bolt
Rate of fire: 700 rounds/min
Effective range: 500m
Feed system: 50-round detachable box magazine
Sights: Iron sights
Weight: 4,2 kg
Manufacturer: Izhevsk Machinebuilding Plant
AG-2033 was designed in Izhevsk, not long before Armageddon. Initially it was designed as PDW, but failed - it was too long for this role, then it was proposed as SpecOps weapon - and Russian MVD (Ministry of Internal Affairs) signed the contract. AG-2033 was distributed among police special forces.
P.S.: Actually, it was my little attempt of making "really working" redesign of AK-2012 from "Metro 2033" videogame.