I originally got the idea after modifying Mframe's design on the Glock tablestand holster to also hold a spare magazine. I figured why not have a stand only for the magazines too.
This is my simple design to hold 2 magazines (should fit all 9mm glock mags).
It can be mounted on side of a table, directly on a wall or by the tablestand/rack.
Any feedback would be much appreciated :)
Mframe's profile : https://www.thingiverse.com/Mframe
The table holster : https://www.thingiverse.com/thing:2469412