Schlieren image of an AK-47 shot.
https://diqn32j8nouaz.cloudfront.net...7_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...057#post157223
https://www.homemadetools.net/forum/...543#post170216
https://www.homemadetools.net/forum/...075#post187676
