This is 16 variants of a belt mounted magazine carrier designed for Smith & Wesson M&P doublestack 9mm magazines. The configurations are as follows:

Left Side - For Right Handed Shooters

Model A - 22 Degree out, tipped forward - Bullets Point Back
Model B - 22 Degree out, tipped forward - Bullets Point Forward
Model C - 17 Degree out, tipped forward - Bullets Point Back
Model D - 17 Degree out, tipped forward - Bullets Point Forward
Model E - 22 Degree out, tipped back - Bullets Point Forward
Model F - 22 Degree out, tipped back - Bullets Point Back
Model G - 17 Degree out, tipped back - Bullets Point Forward
Model H - 17 Degree out, tipped back - Bullets point Back

Right Side - For Left Handed Shooters

Model I - 22 Degree out, tipped forward - Bullets Point Back
Model J - 22 Degree out, tipped forward - Bullets Point Forward
Model K - 17 Degree out, tipped forward - Bullets Point Back
Model L - 17 Degree out, tipped forward - Bullets Point Forward
Model M - 22 Degree out, tipped back - Bullets Point Forward
Model N - 22 Degree out, tipped back - Bullets Point Back
Model O - 17 Degree out, tipped back - Bullets Point Forward
Model P - 17 Degree out, tipped back - Bullets point Back

I have tested and used most of the variants from A-H as a Right-handed shooter. I'm currently using Model F, which is pivoted out the furthest away from the body, tips the magazine towards the back and has the bullets facing back. Most USPSA shooters would use Model E with the bullets pointed forward.

Recommend printing in PETG for durability under temperature. Will need 4 m3 socket head screws and 2 nylock nuts to maintain tension. Assembly is simple. Clean out the holes in the back and screw 2x M3 bolts through the top, down through the belt clip mounting block and into the carrier. Tolerance is designed for the threads to tap into the plastic on their own. The remaining 2x M3 bolts are for tension on the side and should be mated with M3 Nylock nuts to maintain tension.

My next step will be to replicate this for Glock mags and produce a better belt mounting system that doesn't require re-threading your belt through the loops.