These were designed specifically for the Mark IV 22/45 mags. They may fit other mags unchanged, or with some scaling, or with small mods. Fusion 360 file included. Mags fit bullets inward or out. Optional magnet to temporarily join several together -- or leave them loose, or glue them permanently together. If you use the magnet, you'll need a 8mm x 2mm magnet, and pay attention to the North/South orientation as you glue it in place!
Will print upright (main opening pointing UP) with no supports (may need brim for stability). Ordinary PLA is fine. Low infill is fine. The design has a max overhang is 45%. If your printer can handle that, you won't need supports.

Printables Tags: belt; magazine; rugermarkiv; 22lr; magazinepouch