The stock climbed 8.68 per cent to Rs 28.80 on the BSE. During the day, it soared 12.45 per cent to Rs 29.80.
On the NSE, shares of the company jumped 9 per cent to Rs 28.90 at close.
On the volume front, 27.40 lalh shares of the company changed hands at the BSE and over one crore shares were traded at the NSE during the day.
"Ministry of Defence (MOD) has vide its letter dated June 30, 2015 qualified our solution to upgrade Zu 23 air defence gun, after field evaluation," the firm said in a BSE filing.
"MOD is yet to open the commercial bids to decide on the party to be awarded the contract," it said.