There is no meaning in selling a licensed product abroad anymore than selling Pakistani built Agosta B submarines. Just come up with a basic design that is somewhat different and suited to Pakistan. Get the local talent like Daudsons involved. This is quite simple, no magic to making your own gun.
See if 7.62x51 really makes sense or not, come up with the best caliber by actual field use. Or for strategic reasons, go with the Chinese current 5.8mm. Or whatever.
A journey of a 1000 miles begins with one step. No step is poor policy but I'm not sure what India is doing they seem to be buying all kinds of calibers willy nilly.
If you want an FN Scar H you could go the CZ route, give the gun to a local gun manufacturer, provide them R&D funds, and tell them to come up with something as similar as possible but just different enough to have its own IP.
Daudsons did a good job with its hand guns in doing exactly that. Give it to Daudsons. Help them with the polymer materials. Viola. Not sure why this has to be more complicated than that.