Let me try... It says "6.35mm Korovin pistol, model of 1926. This piece was awarded to the commander of a communistic regiment Govorov I. E. for liquidation of guerrilla bands in 1930".Spotted this picture of a Korovin in the KGB's Museum in Moscow. Korovin is strongly identified with NKVD and KGB, but I have never seen any specific accounts.
Any board members who can help in the translation?
Judging by the time period (late 20th), it's probably the organized crime units Comrade Govorov was fighting, not political enemies of the regime...