I got the explosions from youtube, they are HD greenscreen FX .
The Machine gun fire sounds are from Call of duty 3 .
I also found the Ricochet FX on youtube.
I got some of P-61 flyby sound FX from IL-2 and some from youtube.
This a clip from my full length movie the Tank Busters.
This clip is one I am cutting from the movie.
It's not finished yet, a couple more months.