QUICK-CLIP system carabiner for a backpack

In addition to the carabiner, you might need a buckle that attaches to a strap or MOLLE webbing on your backpack and, optionally, a locking pin to ensure the element won't slip away accidentally.

Both components can be obtained from the original QUICK-CLIP model https://www.printables.com/model/587654-quick-clip-gen-3-base-starter-kit/files for some standard strap sizes. I also uploaded those here as the contest requires completeness of a model. Additionally, I have created a narrow buckle for one of my backpacks, which I couldn't find elsewhere.

The carabiner gate plugs into the two holes on the carabiner and then tilts inside.

Here's a little schema of how everything fits together:

The print settings are similar to those of the original models, and no supports are required.

I tested this with PLA, and it held my keys securely even while riding a bike on a bumpy road.

Stiched those two models together.