BMP-2 Anti-Tank Missile.

The “missile on top” of the BMP-2 turret is the AT-5 Spandrel, NATO reporting name for the Soviet 9M113 Konkurs. It’s a wire-guided anti-tank missile system mounted externally on the turret in a box launcher. The BMP-2 typically carries a launcher for one ready-to-fire missile, with additional missiles stored inside the vehicle. The BMP-2 (Boyevaya Mashina Pekhoty, Russian: Боевая Машина Пехоты, literally "infantry combat vehicle")[2] is a second-generation, amphibious infantry fighting vehicle introduced in the 1980s in the Soviet Union, following on from the BMP-1 of the 1960s. In 1987, the BMP-3, a radically redesigned vehicle with a completely new weapon system, entered service in limited numbers with the Soviet Army.