2K12 Kub

2K12 “Kub”
NATO reporting name: SA-6 "Gainful"
2K12 “Kub” ; NATO reporting name: SA-6 "Gainful"
	2P25 TEL with missiles elevated (2K12 Kub SAM of Serbian 250th Air Defence Missile Brigade)
Type	Tracked medium-range surface-to-air missile system
Place of origin	Soviet Union
Service history
In service	1967–present
Used by	See list of operators
Wars	List Yom Kippur War; Angolan Civil War; Chadian Civil War; Western Sahara War; Iran–Iraq War; 1982 Lebanon War; Gulf War; Yugoslav wars; Kosovo War; Syrian Civil War; Russo-Ukrainian War Russian invasion of Ukraine; ; Yemeni Civil War (2014–present); 2020 Nagorno-Karabakh war; ;
Production history
Designer	NIIP/Vympel; MMZ (GM chassis);
Designed	1958–1967
Manufacturer	Ulyanovsk Mechanical Plant (SURNs); ZiK (TELs);
Produced	1968–1985
No. built	500 launchers, 10,000 missiles
Variants	2K12 Kub, 2K12E Kvadrat (export version), 2K12M3, 2K12M4
Specifications (2K12 Kub)
Main; armament	3 3M9M4(or variants) guided missiles
Engine	integral rocket motor/ramjet booster and sustainer motor
Guidance; system	command guidance with terminal semi-active radar homing (SARH)

The 2K12 "Kub" (Russian: 2К12 Куб; English: 'cube') (NATO reporting name: SA-6 "Gainful") mobile surface-to-air missile system is a Soviet low to medium-level air defence system designed to protect ground forces from air attack. 2К12 is the GRAU designation of the system.

Each 2K12 battery consists of a number of similar tracked vehicles, one of which carries the 1S91 (SURN vehicle, NATO designation "Straight Flush") 25 kW G/H band radar (with a range of 75 km (47 mi)) equipped with a continuous wave illuminator, in addition to an optical sight. The battery usually also includes four triple-missile transporter erector launchers (TELs), and four trucks, each carrying three spare missiles and a crane. The TEL is based on a GM-578 chassis, while the 1S91 radar vehicle is based on a GM-568 chassis, all developed and produced by Russian manufacturer MMZ.