This is a simple remix of the clip by Nintendstroid. It has been cleaned up and lengthened to let it hold on to 2 rows of molle for larger/heavier items.

I used it as a glue on adapter for many printed things for molle vests and belts.

Its a small item so I printed them on my Monoprice Select Mini.

0.1 layer height (Have not tried thicker layers, I like the fine details and I am willing to wait for a longer print time)
1.6 shell 20% infill (this makes the tongue and hinge solid but saves PLA on the base)
I print on the side as the STL shows so the layers are longways to be stronger.
The rounded end can be printed without support in the PLA I used.