I try to become familiar with all of the guns that are commonly used in the countries I visit. As I’ve never been to Russia, I haven’t studied their handguns other than understanding the Makarov and Tokarev pistols that are common here in the USA.
I saw this well-written article on Quora. I had no idea the Russians had so many pistols that I knew nothing about. If you are interested in weird Russian guns, you’ll like this article.
It’s currently the first answer listed, but if it changes places before this article is published, it’s the answer written by Joseph Bilboa.