Saturn?
Yes, a bit unknown because they serve where normal person never meets them. They are called "Jail Spetsnaz". Keeping order in prisons.
"Moscow department of Federal service of Punishment Execution (FSIN) Special purpose unit. "Some tasks:
-Preventing crimes in Moscow detention facilities
-Anti-riot actions in detention facilities
-Jail-break criminals search and arrest
-Securing the special operations
-Hostage rescue in detention facilities
-Counter-Terrorism actions in detention facilities
New kids getting familiar with the said shotgun (trainer lookin' mean and wide)