The 9K120 Svir, 9K119 Refleks, 9K119M Refleks-M (NATO reporting name AT-11 Sniper)[5] are laser beam riding, guided anti-tank missile systems developed in the Soviet Union.

[6] The Indian defence ministry has signed a contract with Bharat Dynamics Limited (BDL), a public sector company under Department of Defence Production, for supplying Invar Anti Tank Guided Missiles to the Indian Army.

[10] The 17.2 kg (37.8 pound) missile is 690 mm (27.1 inches) long and has pop-out fins (with a 250 mm/69 girth span) that aid in guidance.

The missile is guided by the modulated laser beam steered by the tank gunner.

[11][12] There are also high explosive versions produced named 9M119F and 9M119F1 which are intended to defeat enemy personnel.