Overengineered 5.56x45 ammo box (flat layout)

Other projects from overengineered ammo box series:

https://www.printables.com/@Zimny_4180406/collections/3128956

File names are shared across the entire project family. A part with a given name from one project will fit as a part with the same name from another project.

Additionally, a capital letter in parentheses indicates "the box size" a given part fits (e.g., 5.56x45 and 5.45x39 trays can be used interchangeably in the same mechanism).

Bill of materials (printing suggestions)

• bottom (A) (organic support and brim enabled)

• top cover (80% infill for extra primer protection)

• gearbox base (A), one normal, one mirrored (support))

• cam gear (ABC), two normal, two mirrored

• idler gear (ABC), 4 pieces

• gear latch (ABC), 2 pieces

• 5.56x45 tray (A) (organic support)

Additional models in the project:

Gear latches with different snap forces. Could be used instead of the gear latch

• gear latch - (ABC) (weaker than standard)

• gear latch + (ABC) (stronger than standard)

• gear latch ++ (ABC) (the strongest)

Lightweight tray (to save filament and printing time)

• 5.56x45 tray lightweight (A)

I hope the provided step-by-step instructions are sufficient for assembling the box. Please note that assembly should be carried out without excessive force (except for installing the latch). After assembly, it's a good idea to turn the cam gears until they stop at the end of their travel.

Changelog:

2026.02.01

• Minor changes in the description to bring the model in line with the rest of the family

• File name changes (files themselves remain unchanged)