Cartridge Knife 4
This photo depicts what appears to be a cartridge in a metallic case. Instead, a metal blade is inside the cartridge.
https://leb.fbi.gov/image-repository/unusual_04_ok.jpg/view
https://leb.fbi.gov/image-repository/unusual_04_ok.jpg/@@images/image
Cartridge Knife 4
This photo depicts what appears to be a cartridge in a metallic case. Instead, a metal blade is inside the cartridge.