The final trials of the updated version of the Arjun tank would be tested in the desert conditions in Mahajan field ranges in Rajasthan, Army sources said here.
The Army had asked for 93 improvements to the tank which include the capability of firing the anti-tank LAHAT missile, laser protection suite and improved armoured protection for the vehicle, they said.
Army officials said of the 124 Arjuns ordered by the force, 120 have been inducted and are part of armoured regiments deployed in the borders with Pakistan.
The Army had asked the DRDO to carry out further upgrades on the next order of another 124 tanks which will be named as Arjun MkII.
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The second order for 124 tanks was placed by the Army after comparative trials between the Arjun and the Russian-origin T-90 tanks in the Pokhran testing range couple of years ago.
Arjun will have a better gun barrel with an Equivalent Firing Charge (strength of the barrel to sustain firing) of 500 rounds against the T 72's 250 rounds.
The Chennai-based Combat Vehicle Research and Development Establishment has designed the Mark II version of MBT at its facility there.