Defence sources said if the confirmatory tests of the indigenously-developed guns comes out as positive, it will pave the way for Bulk Production Clearance (BPC).
Under the first phase, the army will place an order worth over Rs 1,200 crore for 114 such guns with the Ordnance Factories Board.
"The confirmatory trials are going on after and if they prove to be successful, the guns will go in for bulk production for the Army," sources told PTI.
Dhanush will be the first artillery gun to be acquired by the army since the purchase of Bofors guns from Sweden in 1987.
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It is a modified version of the Bofors and underwent winter trial in 2013 and summer trials in 2014.
Defence Minister Manohar Parrikar had earlier this year said the tests for the 155/45mm caliber Dhanush gun was sucessfull.
Sources said minor changes were done following the trials, following which the confirmation trials have begun.