The Buk-M2 (NATO name SA-17 Grizzly, Russian name 9K317) is a Russian-made mobile medium-range surface-to-air missile (SAM) system designed to defend field troops and logistical installations against air threats. SA-17 Grizzly is an upgraded version of the proven Buk-M1 mobile air defense system and retains its main features. It defeats strategic and tactical aircraft, tactical ballistic missiles, cruise missiles, air-launched missiles, guided aerial bombs and helicopters, including hovering rotorcraft, in the presence of heavy electronic countermeasures and under intense enemy fire. The Buk-M2 can engage a wide variety of targets from aircraft to missiles flying at an altitude of between 10 and 24,000 m at a maximum range of 50 km in given conditions. The SA-17 Grizzly can engage simultaneously up to 24 targets flying from any direction.