Modular 100rnd ammo box for 223/5.56, 9mm, and others. 3D model thumbnail

Modular 100rnd ammo box for 223/5.56, 9mm, and others.

by Ctowns5 · via Printables
FormatSTL
CategoryGadgets
LicenseCC BY-NC-SA
Triangles7.8k
UploadedMar 13, 2026
⬇ 2.2k downloads ❤ 363 likes 👁 9.6k views

Description

Ammo box to hold 100 223/5.56 cases. All screws are m3x30 unless you use the handle then those 2 should be m3x35. March 2024, added a 9mm tray as requested so you could do half and half or use the same box for 9mm or 223. July 2024, added a 223 tray that has case shaped holes that hold the cases at the shoulder rather than being cone shaped which allows them to rest on the bullet tips. Also added a 45ACP and 6.5 Grendel tray. Added a taller version of the box and tray for 308 family cartridges. The tall box uses the same lid and latch but the 308famtray can hold 243, 260, 7mm-08 and 308s. Enjoy and please post your makes. August 2024, added a 12 ga tray for the tall box. Sept 24, added a 30-30, 300blk and blank trays for both short and tall box to make it easier for people to remix their own trays. Jan 25, added a 40 S&W tray May 25 added a 41 mag tray June 25 added Colt 45 tray July-Aug 25 added a 17 hornet tray that holds 78 and a 200 rnd double decker 9mm tray system. Also added a creedmoor tray and an updated grendel tray with slightly looser holes and an optional handle. Nov 25 added a 2mm taller lid and a 22lr tray. Dec 25 added 2 new handle designs and a box bottom with a cut out for the bigger handles and a set of all 3 handles for the tall boxes. Any handle will work with any box but they fit best with the boxes they were designed for. Feb 26 added a 5.7x28 tray March 26 added 6.5 PRC tray "use with 2mm taller lid in tall box" and new "improved" 12 ga tray as well as a 7mm taller lid.
box ammo 9mm 45acp 300blk 223 12gauge 41magnum 3030winchester 308win 308winchester 300blackout 65grendel creedmoor 243win 7mm08 65prc grendel colt45 260rem

Originally published on Printables