You seem to have the wrong idea about the Indo Russian relationship. This is fallacious and grossly overestimating your importance.
This is going to be a long post.
If you look at the world map, India is an extremely important country for Russia. India is important for China and the US also, along with all other major powers in the world. The strategic location makes India extremely important. Draw a line from India to any of the world's oceans and major resource centers, you will get an idea. We have access to Africa, South East Asia, the Middle East, Australia and South America. We are slowly getting access to Central Asia as well. All other countries have direct access to only a few areas among them.
The reason why Russia needs India is because China is a threat to Russia as well. The Soviet Union and the Russians have always tried their best to keep India strong because of the China factor.
And this is not even counting India's growing economic heft.
The fact remains that you need Russia far more than Russia needs you as a vreat maj9rity of your inventory is Russian and you need spares to keep it going.
It's changing really fast. Most spares support is being indigenized by bringing Russian companies into India for production by forcing them to commit to joint ventures with Indian private companies. This change is very recent, and saw changes to Russian laws.
https://www.indiatoday.in/pti-feed/...nsfer-jvs-with-indian-firms-894474-2017-03-21
A number of Russian defence firms has broadly agreed to facilitate speedy repair and overhaul of Russian-origin military platforms in India and manufacture their spare parts through joint venture and technology transfer with Indian companies.
Almost the entire support structure for Russian equipment is being indigenized with majority control with Indian companies. Once done, it will immediately shift our imports to indigenous ratio from 70:30 (it is 60:40 right now) to 30:70 over the next 3 years.
And then, we are replacing everything else with Indian designed systems, which should start showing results over the next 5 years.
In the near future, most of the defence relationship between India and Russia will center around highly strategic systems like FGFA, naval and space based technologies rather than less strategic systems like we have been doing over the last 60 years or so since they will mostly be indigenized. So instead of saying India will be dependent on Russia, we can say that both countries will achieve a higher grade in relations as strategic partners than simply have a buyer-seller relationship when it comes to defence.
Pak Russia relationship has many problems the biggest one being lack of money on the pary of Pak to pay for the items it wants and lack of money to offer loans on the Russian part. Secondly our move towards Russia would mean setting up an entirely new inventory of spares and expendables which is a maintenance nightmare from the admon point of view. Efficient handling requires commonalityof expendables which we dont have. There maybe an element of mistrust on both parties part due to our past skirmishes so it will take time to remove the mistrust.
Russia is not a country that can actually help out Pakistan in any meaningful way as compared to China. Pak doesn't have the money necessary to invest in Russia's defence industry immediately, most of it will go into the Chinese industry. Once Chinese policies start interfering with Russian interests, you will see Pakistan drifting away from Russia. This will become visible in just 10-15 years or so. Not long enough to create any meaningful relationship with the Russians.
Laztly Russian design ethos is different to the equipment Pak is used to handling and this will continue to be a problem. It will take time for both parties to adjust and may or maynot happen. Pak has all of the advantages which it rewuires in China and will therefore continue to rely on it for arms purchases.
There's nothing wrong with Russian equipment, most of the criticism is just ridiculous propaganda. We see that for a fact with the amount of sorties the Russians have conducted over Syria, 30000 sorties in just 2 years.
The biggest problem with Russian equipment has been bureaucratic hurdles, that's why imported Russian equipment don't do very well in many countries. The Russian govt does not allow importers to talk to OEMs directly, everything is handled through the Russian govt (Rosoboronexport). And they don't allow the signature of contracts for long term deals. And when they sell spares, it is for a year or less. They do it because they want a constant stream of orders every year. So there are many times during the equipment's lifecycle that spares are not available.
Parrikar forced the Russians to change their laws regarding long term contracts and access to OEMs, allowing them to set up JVs and other instruments which will allow a constant supply of spares and support from Russian OEMs.
Read this article:
http://www.thehindu.com/news/national/Russian-spares-for-Indian-weapon-systems/article17024135.ece
Of course, this could only be India specific.
There has been a change in Pak buying tdndencies over the last 2 years and we are now talking of building in house and having local assembly rights and other offsets which depicts the confidence of the armed forces in its capability to manufacture newer equipmentwith some help.
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Local assembly is only the start of a very long journey. I don't know why you brought it up because Russia is not in the business of helping develop the defence industry of any country. They only want large purchase orders, to which they provide ToT if the order is big enough. And even after that, they make ToT very difficult to implement. If you really want actual assistance, you should be looking towards Sweden. So if you can't sign big ticket deals with the Russians by any measure, either defence or oil supplies, their support will be very limited.
The Russians find India to be a far more lucrative defence market and a more significant political partner. I don't see any long term advantage for the Russians in dealing with Pakistan at the expense of relations with India.