I am just thinking back to the leaked defence audit that showed DRDO pretends to develop radar technology, but actually buys it from Israel and claims it as its own. Lets be honest, didn't Indian missiles have Israeli gyroscopes? Israel is turning into DRDO's masked research lab. I say shut it down, fund private companies either Indian, or foreign based in India and get them to develop it in house. That way GoI controls technology rights because they paid for it. It is no benefit buying second hand technology from Israel that Israel still controls at the end of the day.
Development:
The DRDO had produced and proven many new state of the art technologies with the Agni-IV like composite rocket motors, very high accuracy
Ring Laser Gyro based Inertial Navigation System, Micro Navigation System, Digital Controller System and very powerful onboard computer system......
Agni-IV - Wikipedia, the free encyclopedia
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Now for Radar, as you said "but actually buys from Israel", for that matter let us see what wiki have to say, I found these lines......
1) The MMR has been completed with Elta Israel's assistance and now involved Elta EL/M-2032 technology for Air to Ground mapping and targeting. This "hybrid" MMR has been tested, validated and will be supplied for the initial LCA Tejas fighters.
2) Medium Range Battlefield Surveillance Radar: in 2009, the LRDE (DRDO) noted that it was working on a Long range battlefield surveillance radar. It is possible that the BFSR-LR project has replaced this earlier project and the Indian Army will utilize the BEL built ELTA designed BFSR-MR's for Medium Range surveillance while using the LRDE designed systems for Long Range surveillance.
Defence Research and Development Organisation - Wikipedia, the free encyclopedia
The point is whenever DRDO use Israel's tech, they never hide it from the media.
Same way in the RLG part I trust them if they say that they had produced it and there is no reference of any Israel's company also.
BTW, this is a global village, companies may develop entire product but then they use some of systems or sub systems which are not developed by them or may be jointly developed or developed with others help, does it make any difference?