Spetsnaz GRU hand-to-hand combat style
is a martial arts
system taught by Alexandre Popov
for use by special reconnaissance/saboteur units of the GRU
Popov's System, based on Southern Chinese and Russian styles of fighting was developed in the 1920s and 1930s. There is strong infuence of Shaolin kung fu in this system.
Though also taught to Spetsnaz, it is completely different from and has no relation to Systema.