M39 20mm revolver cannon installed on a Northrop F-5E light fighter.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...achine_gun.jpg
Previously:
https://www.homemadetools.net/forum/...209#post161292
https://www.homemadetools.net/forum/...297#post154225
https://www.homemadetools.net/forum/...436#post150979
https://www.homemadetools.net/forum/...374#post150738
