The KSG causes me a bit of grief. The spent cases on 2-3/4" shells seems to whack me in the wrist every single time and draw blood. Primary Machine has come up with a solution for folks like me so we can comfortably shoot our KSG shotguns.
Primary Macine: http://primarymachine.com/ksg-shell-deflector.html MAC Patches: https://www.coppercustom.com/product-category/clothingapparel/patches/ Full30: http://www.full30.com/
Are you interested in getting a degree in Firearms Technology? Check out Sonoran Desert Institute: https://sdi.edu/programs/