Build the insert around your gear.
StashGrid is a browser-based designer for 3D-printable case inserts. It is for printer owners who want an insert shaped around their gear, without CAD or pick-and-pluck foam.
Free during beta 🔥 Download your STL today!
Pick-and-pluck foamStashGrid
“It takes very little time for the other squares to start pulling out when you don’t want them to.”
M4Carbine.net, Nov 2018Cutouts follow the gear profile you place.
“It’s like $3 more to buy a new case than it is to buy replacement foam.”
r/harborfreight, Feb 2024The file is yours. Print it on your own printer, and print it again when you need to.
“Works well until you hit corners and turns.”
Snipers Hide, Jun 2020Drag, rotate, undo. Corners follow the profile.
MyCaseBuilder lists a standard lead time of 15 business days. Case Club does not accept returns on foam inserts.
mycasebuilder.com/shipping · caseclub.com/return-policy, checked Sep 2026The STL is yours the moment the layout is ready. Slicing and printing are your next steps.
“You’re stuck with doing some trimming or grabbing a new foam insert.” MyCaseBuilder charges half the foam price to fix a design.
Rokslide, Apr 2023 · mycasebuilder.com/faqs, checked Sep 2026Your layout stays in this browser. A change or a mistake costs a reprint, not a new insert.
Fit depends on your case, material and print settings. Physical print validation is in progress.
Is your gear on the list?
Lights, optics and magwells attach to a firearm and get cut out with it. A profile in the library is not proof of fit in every case or layout.
Firearms
- G17 Gen5
- G17 Gen5 MOS
- G17 Gen6 Standard
- G19 Gen5 A-CUT
- G19 Gen5 Compact
- G19 Gen5 MOS Compact
- G19 Gen6 Compact
- G43X MOS Subcompact
- G45 Gen5
- G45 Gen5 A-CUT
- G45 Gen5 MOS
- G45 Gen6 Compact
- G48 MOS Compact
- G49 Gen6 Standard
Accessories
- Agency Arms Duty Magwell
- Backstrap G17 Gen5
- Black Trident Basepad +2
- G17 Mag
- G19 Mag
- Holosun 507C X2 / 508T
- Holosun SCS-MOS
- Radian Afterburner
- Streamlight TLR-1 HL
- Streamlight TLR7-XA
- Surefire X300T-B
- Trijicon RMR (RM06/RM07)
- Trijicon RMR HD 3.25 MOA
Tools
- Extraction Cutout
- Glock Speedloader 9mm
Three supported cases.
Insert model dimensions from the designer’s own case models. They describe digital geometry, not a measured fit.
180 × 180 mm6 pieces
220 × 220 mm4 pieces
250 × 220 mm4 pieces
256 × 256 mm4 pieces
256 × 256 mm4 pieces
350 × 350 mm2 pieces
Three steps, no knife.
- 1
Choose a case
Start from a supported case.
- Status:ReadySelected: G19 Gen5 MOS CompactPos: 25, 4 mmRot: 0°Cut-out shortcuts:Rotate R/ShiftRDelete Del2
Arrange your gear
Drag supported profiles into place. Rotate, undo, move again. Check it in perspective or from above.
- 3
Download the STL
One file per layer. Slice and print it on your own printer: the printing guide covers splitting and settings.
Every way to replace worn foam.
No prices or lead times here; they vary by case, vendor and date.
| Option | Fit | Changing the layout later | Wait |
|---|---|---|---|
| Reinforce the factory foam | Same cube grid | Removed cubes do not go back | None |
| Replacement foam set | Same cube grid | Start again with a new set | Shipping |
| Cut your own foam | Depends on tools and skill | Recut or replace | Your time |
| Custom-cut foam, made to order | Close, if measurements are right | Order a new insert | Days to weeks |
| Modular grid or dividers | Follows the grid, not the outline | Rearrange any time | Shipping |
| 3D-printed insert | Follows the digital outline; test fit required | Edit the design and reprint | Print time |
Compare and plan
- Pick-and-pluck foam alternatives
Reinforce it, replace it, cut your own, order custom, go modular, or print. What each costs, and how Kaizen compares.
- Custom foam vs a 3D-printed insert
Lead times, mistakes and changing your loadout, and where foam still wins.
Questions
Can I save my design and finish it later?
Your layout is saved in this browser’s local storage, on this device. There is no cloud library. An exported STL keeps the printable geometry but cannot be re-imported to edit.
Will a printed insert protect my gun like foam?
That depends on material, geometry and print quality. StashGrid does not certify impact protection, moisture protection or a universal fit.
What do I need to print it?
Slicing software and a printer. Compare the model with your build area; split it in the slicer if it does not fit. Export each Apache 3800 layer separately. The printing guide walks through it.
What can I do with the file?
Print it as many times as you like for personal use and share it with friends. You cannot sell the file or printed inserts.