Some very cool high speed videos of gas inside of a suppressor with a transparent tube:
https://youtu.be/7pOXunRYJIw
Behind the scenes:
https://youtu.be/v7fqcYxV_b4
https://youtu.be/7pOXunRYJIw
Behind the scenes:
https://youtu.be/v7fqcYxV_b4