According to the video uploader, this amazing video belongs to the Ministry of defence of Finland. It shows a rocket launcher firing a complete battery of missiles in the sky. Although this information is not easy to verify, here are some information about this loud and impressive weapon. It’s the famous system multiple rocket launch Soviet BM-21, nicknamed ‘Grad’ (‘hail’ in Russian). It was first launched in 1963 and fires 40 122.4 mm rockets in a row… Like on this mind-blowing video.