Here are two flare shells & cases for your 12G & 20G shotguns great for emergencies or just fun, they were requested by https://www.thingiverse.com/Magicman0423/about ,  Thanks Nate ;)



These use a Butcher cartridge 9 x 27 mm to propel the homemade flares

https://www.afg-defense.eu/butcher-cartridge-9-x-27-mm-tempo-st.4-50-pcs/



!!!Note: I'm always open for suggestion and help on improving the design and proof of concept.



***UPDATE:*** Added shells that use .22lr Blanks 



Full build details will follow in the make.



!Don't forget to check out my other Cool designs and Follow my Weekly dose of KooKoo uploads, Enjoy ;)