Dummy Co2 12g 3D printable model by AVTeckie

Dummy Co2 12g

Source: Thingiverse by AVTeckie

The Dummy Co2 12g is a free printable 3D model from Thingiverse by AVTeckie. During COVID lockdown I wanted to be able to practice reloading but I didn't want to use a real cartridge just so that I don't wear out the seal prematurely. You can download the STL file from the original listing below and print it at home.

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30 saves Source: Thingiverse Updated 2026-04-16

Tags: Dummy, Co2, 12g

About this model

During COVID lockdown I wanted to be able to practice reloading but I didn't want to use a real cartridge just so that I don't wear out the seal prematurely. Reloading without the cartridge is annoying. I measured a Crossman 12g cartridge and I designed this to rest on the magazine frame instead of the seal to reduce wear during practice. I'm using a KJW KP-07 1911. I only have the one so I can't say for sure it will fit any CO2 mag so feel free to test it and leave a note! It might depend on how the mag is designed around the seal.

Frequently asked questions

Is this 3D model free to download?
Yes. Dummy Co2 12g is free to download from Thingiverse. Click the "Download free STL" button above to open the original listing.
Where is the STL hosted?
The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by AVTeckie.
Who made this model?
Designed by AVTeckie, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?
Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.

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