Magnetic shell holder. takes 6x12G shotgun shells. I printed multiple, load them with shells and quickly swap so they act as ammo clip.

Print suggestions:

• PLA for entertainment or testing only. Better use a tougher & UV resistant material for actual use.
• 40% or more infill density and 3+ wall lines to ensure strength.

Optional accessories:

• you can insert magnets into the slot to allow upside-down insertion of the shells, which can help a little with quickly taking the shells and loading them. Not as reliable as putting them top-down into the holder though.
• you can attach Velcro to the back of it so it can stick to the gun or your body vest.