Well the one with most range is the SA-2
Class: Medium Range, Surface to Air Missile System
Origin:China Length: 10.7 meters
Diameter: 70.0 cm
Tail Span: 54.0 cm
Weight: 2300.0 Kg
Warhead: 130 Kg High Explosive
Propulsion: Solid Propellant Booser with Liquid Propellant Sustainer
Guidance: Radio Command
Max Speed: 3.5 Mach
Max Range: 60 KM
Ceiling: 85,000 feet
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My Sources say that the air defence command is very close to purchasing both new medium and long range SAMs with ToT. Selection is in i's final stages and as soon as the nod is given by the president those missiles will be coming straight to Pakistan.:nutkick