Question: R-33 was the armament of which supersonic aircraft?
Context: Supercruise is sustained supersonic flight of a supersonic aircraft with a useful cargo, passenger, or weapons load performed efficiently, which typically precludes the use of highly inefficient afterburners (reheat).  Many well known supersonic military aircraft are not capable of supercruise as they are only able to maintain supersonic flight in short bursts (typically with afterburners) while they cruise at subsonic speeds.  Aircraft such as the SR-71 Blackbird are designed to cruise at supersonic speed with afterburners enabled. The Mikoyan MiG-31 (Russian: Микоян МиГ-31 ; NATO reporting name: Foxhound) is a supersonic interceptor aircraft developed for use by the Soviet Air Forces.  The aircraft was designed by the Mikoyan design bureau as a replacement for the earlier MiG-25 "Foxbat"; the MiG-31 is based on, and shares design elements with the MiG-25.  The MiG-31 has the distinction of being one of the fastest combat jets in the world.  It continues to be operated by the Russian Air Force and the Kazakhstan Air Force following the end of the Cold War and the collapse of the Soviet Union in late 1991.  The Russian Defence Ministry expects the MiG-31 to remain in service until at least 2030. The KAI T-50 Golden Eagle (골든이글) is a family of South Korean supersonic advanced trainers and light combat aircraft, developed by Korea Aerospace Industries (KAI) with Lockheed Martin.  The T-50 is South Korea's first indigenous supersonic aircraft and one of the world's few supersonic trainers.  Development began in the late 1990s, and its maiden flight occurred in 2002.  The aircraft entered active service with the Republic of Korea Air Force (ROKAF) in 2005. A supersonic transport (SST) is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound.  To date, the only SSTs to see regular service have been Concorde and the Tupolev Tu-144.  The last passenger flight of the Tu-144 was in June 1978 and it was last flown in 1999 by NASA.  Concorde's last commercial flight was in October 2003, with a November 26, 2003 ferry flight being its last airborne operation.  Following the permanent cessation of flying by Concorde, there are no remaining SSTs in commercial service.  Several companies have each proposed a supersonic business jet, which may bring supersonic transport back again. The R-33 (Russian: Вымпел Р-33 , NATO reporting name: AA-9 Amos) is a long-range air-to-air missile developed by the Vympel.  It is the primary armament of the MiG-31 interceptor, intended to attack large high-speed targets such as the SR-71 Blackbird, the B-1 Lancer bomber, and the B-52 Stratofortress. The Handley Page HP.115 was a British delta wing research aircraft built by Handley Page to test the low-speed handling characteristics to be expected from a supersonic airliner of slender delta configuration.  It formed part of the British supersonic aircraft research programme, carried out in the 1960s and sponsored by the Ministry of Supply, that eventually produced the Concorde. Wallace D. Hayes (b. September 4, 1918 – d. March 2, 2001) was a professor of mechanical and aerospace engineering at Princeton University and one of the world's leading theoretical aerodynamicists, whose numerous and fundamental contributions to the theories of supersonic and hypersonic flow and wave motion strongly influenced the design of aircraft at supersonic speeds and missiles at hypersonic speeds.  This greatly enhanced the development of supersonic flight and supersonic aircraft design. A supersonic aircraft is an aircraft able to fly faster than the speed of sound (Mach number 1).  Supersonic aircraft were developed in the second half of the twentieth century and have been used almost entirely for research and military purposes.  Only two, Concorde and the Tupolev Tu-144, ever entered service for civil use as airliners.  Fighter jets are the most common example of supersonic aircraft. In supersonic aerodynamics, unstart refers to a generally violent breakdown of the supersonic airflow.  The phenomenon occurs when mass flow rate changes significantly within a duct.  Avoiding unstarts is a key objective in design of the engine air intakes (inlets U.S.) of supersonic aircraft which cruise at speeds of M2.2+. The Tupolev Tu-444 is a concept for a supersonic business jet by the Russian Tupolev company.  Tupolev has had previous experience developing supersonic transport aircraft with projects such as the Tu-144, Tu-144LL and other experience with supersonic aircraft with the Tu-22, Tu-22M and Tu-160 bombers.
Answer: Mikoyan MiG-31