It's SRGM for Talwar. Check #324 poster from goa shipyardFrom the article:
Probably the 76mm OTO Melara. BHEL license produces those.
What class frigates ? Triput ? Never heard of this before.
GSL is building 2 Talwar class frigates. But those ships don't use the 76mm. Instead they use the Russian 100mm A-190E naval main gun. Why would the last 2 ships get different guns of smaller caliber when the other 8 are getting the 100mm ?
The other frigates of the IN are the Shivalik class & Brahmaputra class, both of which came with the 76mm as standard. The Godavari class has the 57m as standard. Although there is one 1 of those left in service. The last of the Godavari class, the INS Gomati, is 33 years old. I doubt Gomati will get any upgrades.
The newest frigates, the Nilgiri class, were supposed to get the 127mm BAE Mark 45 Mod4 guns. But that deal has fallen through, so it is possible that the Nilgiris may come with the 76mm. That is the only likely place of order for the 76mm right now, until the ASW-SWC & ASuW NGMVs are launched.
GSL is not involved with the Nilgiri class frigate either. So...doesn't make sense. Unless GSL plans to supply hull blocks for the Nilgiri class frigates.