My choices.....
Foregn
1) SCAR H for Special Forces in limited no
2) CV90120T Scorpion ....best as replacement of Ajeya tanks ,of course with Indian customization
3) Gorshkov Class Frigates
4) David's Sling
5) Additionaly 2A48 or at least 2A46-M5 ,125 mm and L/55 ,120 mm gun technology along...