The Range System is our line of 3D-printable gear for sport shooters. Every piece is an original design, free to download on MakerWorld and print as many times as you like. We don't sell gear. We give it away, so more shooters get to know the AIMONX app. More calibers and more kinds of boxes are on the way.
9mm Ammo Box, 100 rounds
A rugged, 3D-printable ammo box for 100 rounds of 9×19. Original design, free to download and print.
It's the first piece of the Range System. It holds 100 loose rounds bullet down, in two blocks of 50. Two snap latches close it, a full-width printed hinge opens it, and it stands flat on any of its four sides. No screws, no magnets, no metal pins: you print five parts and snap them together.
At a glance
| Caliber | 9×19 (9mm Luger). Also sized for 9×21 |
|---|---|
| Capacity | 100 rounds, two blocks of 50 |
| Outside size | 156 × 173 × 43 mm (6.1 × 6.8 × 1.7 in) |
| Parts | base, lid, insert, 2 latches |
| Hardware | none |
| Material | PETG |
| Lids | engraved (one color) or color inlay (three colors) |
| Padlock | 4 mm hole for a cable padlock |
Built to live in a range bag
Thick walls. 5 mm sides and floor, 4 mm on top.
Stands on any side. The hinge and latches sit inside the outline, so the box stays upright on the bench or the shelf.
Grips where your hands go. Angled ribs on both sides of the lid.
Our logo on the floor. Pull the insert and you'll find the AX logo and aimonx.app engraved in the base.
An insert that holds every round
Rounds drop into hex cells, bullet down. Each cell narrows into a cone that holds the round by the bullet, so the tip doesn't touch anything. About 9 mm of case sticks out, enough to grab each round with your fingers. A solid divider splits the 100 into two blocks of 50, which makes counting easy. The insert snaps into the base and stays put when you shake the box.
Latches that click
Two latches sit recessed in the front, so they don't snag in the bag or pop open by accident. Each one pivots on a pin, clamps the lid to the base, and snaps shut with a clear click.
The hinge runs the full width of the box, snaps together with no pins to insert, and lets the lid open all the way.
Lock it if you want
A 4 mm hole in the front corner goes through the lid and the base. A cable padlock with a 3 mm cable, like the ones made for zippers, keeps the box shut.
Two lids, same box
Engraved: one color, with the bullet, 9×19 and the AX logo engraved in the lid.
Color: the bullet in orange, 9×19 and the AX logo in white, inlaid flush in the lid. Needs an AMS or another multi-material setup.
Both lids fit the same base.
Printing
- Material: PETG for every part. We print with Bambu PETG Basic.
- Layer height: 0.20 mm, first layer included (Bambu Studio 0.20 mm High Quality). The engraving is exactly three layers deep: change the layer height and the lid graphics won't come out right.
- Plate: Textured PEI.
- X-Y hole and contour compensation: 0. The hinge, latches and insert are designed with exact clearances.
- Supports: base only. Everything else prints without them.
- Orientation: the files come already oriented.
Putting it together
- Press the insert into the base until it locks in.
- Open the lid all the way, line up the hinge and push it onto the base until it clicks.
- Close the lid. Hold a latch open, drop its pin into the channels from the top and swing it down. Same for the other one.
- Snap both latches shut. Done.
To open it, pull the bottom tab of each latch out and up. To clean the insert, turn the empty box upside down and tap the rim.
Good to know
- Load rounds bullet down. Bullet up, they won't be held.
- Different bullet shapes sit at slightly different heights. The lid clears the longest 9×19 and 9×21 rounds C.I.P. allows.
- It's an original design, drawn from scratch. Not a remix.
- Free for personal use. Please don't sell prints or post remixes. Want to make and sell them? Email us and ask.
Printed yours? AIMONX Pro is on us
Use code RANGESYSTEM on the App Store and get 6 months of AIMONX Pro, free. No strings attached: when the six months are up, Pro simply ends — nothing renews. If you like it, you can subscribe then.
Good until May 1, 2027. We'd love to see your box, too: send a photo to support@aimonx.app and we might share it on our site and socials.
Want another caliber?
Tell us which one, and whether you want 50 or 100 rounds, in the comments on MakerWorld.
What's AIMONX?
The app this box was made for. AIMONX is a logbook for sport shooters: log a range session and each firearm's round count, your ammo on hand and your maintenance all update on their own. Encrypted on your iPhone, no account.
