This is a weapons and pylon mount system for RC Airplanes. As you can see in my photo, it is very simple to print and attach. Just glue one part to the plane and the other part to the pylon or ordnance and slide it on. It's secure and won't come loose in flight, but so small that no one will notice it on the wing.

Note: Depending on your printer's print quality, you may need to scale the parts a bit to make sure you get a snug fit. I recommend printing the male and female parts as they are and seeing how they fit together. If they're too tight, then reprint one of the pieces scaled up 5% and see if that works. If it's too loose, try scaling one of the parts down a bit and reprinting.

Edit: I also added a micro rail that I made for attaching smaller/lighter ordnance.

Creality

Ender 3

Yes

No

.1

15%

Depending on your printer's print quality, you may need to scale the parts a bit to make sure you get a snug fit. I recommend printing parts A and B as they are and seeing how they fit together. If they're too tight, then reprint ONE of the parts scaled up 5% and see if that works