My point here is completely with regards to scientific gain, No country in the world offered us heat resistance fiber technology for small arms, Today we on our own manufacture such fiber technology which is better than what imported design offered us today or even better than what their own military use ..
Its goes same with barrel, INSAS barrel had issues at extreme cold environment where anti-freeze became freeze or worst, No country worked so extensively on it as we Indians with regards to this problem, ARDE went to fins for help and in scientific exchange we got their metallurgy for barrel and with our own mixture it proved better than most out there and works at Himalayan cold as well as thar heat and one of the most moist areas over the globe, We had to figure it out on our own, This is a scientific gain we had when we have to work on our own.
AFAIK, During last multi-cal rifle trails, Israeli lost at high altitude which was due to its barrel properties, If something is not design as per GSQR and tested to its core cannot be issued to Jawans, It does not matter how a firearm looks or feel to one but must work where it must ..
It takes decades to adapt and familiarize with firearm and firearm itself in service, Something INSAS 1B1 went through and something i have seen personally first hand ..
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I am sure Private.co can bring better quality, And Punj can supply spares and upgrades to all those TAR-21 in service at SF disposal, I can only hope Punj manufacture 1B1 too along with TAR-21 ..