7 years? You're rather too optimistic. I would give it at least 10 years for the Army to be fully equipped with the required number of man-portable fire-and-forget anti tank missiles.
So then we wait another 50 years for it? Knowing the DRDO, this one is going to be a dud deal, unless we get the private sector to participate which has a semblance of work culture and time lines/targets.