Lucky, All of our small arm, mortars in majority are Indian origin so does ammunition, Our artillery backbone is also India so does the ammunition, The logistic fleet of Army too is of Indian origin and spares are made in India, Let it be air or ground, Our Command, Control, Communication and computer so does Satellite are Indian, These are the things will be used mostly in any form of battle ..
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Do you have any grasp of situation of inducting a new system and making a ecosystem where it can adapt, time & cost ?
Let me provide you a example, It took 5-6 years to make a ecosystem for
SA-
13 after its induction, This include infrastructure for storage both missiles and vehicle spares, training both operating and maintenance, Making logistics for that specific system which is does not share spares with any-other type, It does not matter how efficient a weapon is, But its should work under condition on first place ..
When talking China and India, Consider their own organic defense industry muscle power, Indian is far behind but at least basic gear is Indian and manufacture in India and on which we are confident to defend this country ..
Considering most of our weapon systems are of foreign origin we need steady supply of replacements,ammunitions and fresh stocks to replace depleted reserves and destroyed equipment.
Also if the US and NATO keeps supplying us it will be a signal to China which side of the fence NATO sits.