probably just like Chinese pay Russians to get know how but mostly get inferior products in return like those noisy Chinese submarine.
On par I mean carrying K 5... K 6 SLBM comparable to M 51, trident and Bulava class of SLBM. India has already tested K-5 motors back in 2017..will be part of upcoming S 4 class SSBNs.
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You see India don't like to brag about it's capabilities like Chinese fanboys do about there junk HQ 9 to 20 , J-20 etc etc... and end up importing russians S 400, SU -35 etc in end.
India just don't want to build noisy submarine like Chinese and are waiting for something like Borei class or there western counterparts at minimum in term of capabilities.
Pardon to contradict and even if I always highly appreciate all Your posts on Indian news, I would kindly ask you to stop with such stupid claims: Since no-one knows the real capabilities of the PLA systems, it is plain naive to rate the "Chinese ... junk HQ 9 to 20 , J-20 etc etc", while at the same time we all know that India has its issues: the delays in the Tejas program are a epitome example of this, the mess around the Vikramatitya and now the similar delayed Vikrant are additional ones ... shall I continue?
As such to tell Chinese stuff "junk" while at the same time claiming the K 6 SLBM could be "comparable to M 51, trident and Bulava class of SLBM" will be at least accepted with a huge pile of salt!