인도 방송 출연한 k9-vajra& m777
https://www.youtube.com/watch?time_continue=24&v=eS1F8O7b0hk
https://www.youtube.com/watch?v=MvmiT2nEy10
https://www.facebook.com/ZeeNewsEnglish/videos/artillery-guns-k9-vajra-m777-howitzers-inducted-in-indian-army/1132012480298899/
Indian Army inducts K9 Vajra, M777 howitzers guns
https://www.youtube.com/watch?v=_964XpoYIb4