Russia’s Sprut-SDM1 Light Amphibious Tank has completed partial testing. It is a modernized version of the previous Sprut-SD. The new Sprut-SDM1 light tank is unified with the chassis of the new BMD-4M airborne combat vehicle and uses some fire control elements of the T-90MS main battle tank. Capable of being parachuted, has a road speed of up to 45mph and apparently can swim for seven hours.It mounts a 125mm gun. | The Challenger