Rokot·Khrunichev State Research and Production Space Center
The Briz-K, Briz-KM and Briz-M are Russian liquid-propellant rocket orbit insertion upper stages manufactured by Khrunichev State Research and Production Space Center and used on the Proton-M and Angara A5. The upper stages were also used on Rokot, one of Russia's smaller launchers, before its retirement in 2019.