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The Tokarev TT-33 is a Russian-made semi-automatic pistol chambered in 7.62×25mm Tokarev.
The TT-33 was developed in the early 1930s by Fedor Tokarev as a service pistol for the Soviet military. Internally, its design is actually very similar to that of the Colt M1911. The TT-33 was issued to the Soviet Army during WWII, chiefly to officers. Able to withstand tremendous abuse, large numbers of the TT-33 were produced during World War II and well into the 1950s.
In Predators, Nikolai Fedorov carries a TT-33 as his sidearm. Even if it's not impossible for a Spetsnaz to have this kind of weapon, the use of a Makarov pistol or MP-443 Grach, actual sidearms issued to regular and special forces of the russian army, would be more likely.