5 x 7 ammo holder

thingiverse

I originally designed this to hold 35 rounds of 5.56 or .223 rounds because I like to set stacks of bullets out in my safe that are open and easy to access rather than keeping them in cardboard boxes. They are easier to pick up to load into the mag rather than fumbling around with them in the box. I also found that it can easily scale down in Cura to accommodate 9mm or .40 cal pistol rounds.