This is a holder/dispenser for 30 round ar-15 mags. It can be wall mounted or sit on a shelf. the base will hold 2 mags while each sleeve will hold 5. The sleeves are stackable so it can hold as many mags as you need, but I have only tested up to 12 at a time. If using gen 3 pmags, with the feed lip covers, I would recommend scaling up a few mm. If storing loaded mags, you should increase the infill for strength. I welcome any feedback on how to improve the design.