Indian Light Tank is a make 1 category project where GoI gives 90% funding for developing prototypes, at this point in time this project is not trying to answer all of "Make in India" questions, it is answering a very specific set of questions i.e can Indian industry develop a prototype within a short period of time. the answer is a resounding yes.
let it pass the high altitude tests, let the cockerill turret perform in high altitude (hot and cold conditions), we will have more clarity two years from now.
even if we assume, everything goes well in testing, user certification and RFP there after, induction is a good 5 years away. lots of things can happen between now and then in terms of domestic manufacturing capabilities.
https://www.makeinindiadefence.gov....t_Tk_Mk-1_Brief_for_uploading_DDP_Website.pdf