Shotgun shell cards used to hold 6 shells that can be attached to most shotguns with hook and loop tape (Velcro). If desired you can also place a loop of paracord to allow you to quickly rip these off the side of the shotgun and replace the card with another. I would never use these in a duty capacity, home defense, or any real world scenario where your life or someone else's would depend on it. These are strictly for use in training and recreational shooting.
I recommend these be printed in PETG at 100% infill for strength and rigidity. PLA+ can be used, but it doesn't flex as well as PETG in my experience. No supports needed if printed with shell carrier in the default orientation.
Please note that I have experienced some issues in really cold weather where the printed shell carrier contracts making it a little harder to extract shells which is why I don't recommend these shell carriers for any serious application.
The author marked this model as their own original creation.