All 360 frontline foot/mountain infantry battalions of IA will get 144,000 of SIG716 rifles and Negev N7for its riflemen.
Rest mech inf,rashriya rifles,support units in inf battalions,arty,officers will get AK-203,CAR816 carbines.
Para sf and special forces have seperate arms with SCAR coming and mk48.
SIG716 and negev being of same calibre will have ammo commonality.
Than why the hell you want any other Rifle and just increase the orders of SIG and try to produce them in India. Choosing AK when you are getting SIG in 1000 $ price is stupid.
DI sig716 is not suited for assault or close quarter COIN as much kalashnikov which troops know and trust.AKs very reliable for COIN and assault duties.SIG has better range,more accuracy and better round,as well as being better in mountains and deserts.
SIG 716Tread is much cheaper than other SIGs due to DI instead of gas piston,but you need good optics on them to make the best out of the guns.Buying magnification optics for all guns in million plus army is unaffordable.
Around 150,000 Sig 716 along with 20,000 negev n7 will be frontline arms for all 360 infantry battalion's riflemen with common 7.61x51 ammo.Rest can use AKs and new carbines.