Is this 3D model free to download?

Yes, Sentry Gun [28mm] is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by rocketshipgames, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Sentry Gun [28mm]

Source: Thingiverse by rocketshipgames

The Sentry Gun [28mm] is a free printable 3D model from Thingiverse by rocketshipgames. I couldn't get the Sentry Gun by bulldog2708 to print reliably or nearly as well as their demo pic, so I reworked it to be more robust and come out more cleanly. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

99 saves Source: Thingiverse Updated 2026-10-03

Tags: Sentry, Gun, [28mm]

About this model

I couldn't get the Sentry Gun by bulldog2708 to print reliably or nearly as well as their demo pic, so I reworked it to be more robust and come out more cleanly. No rafts or supports are required. Print 4 of the legs. There are four versions of the heavy machine guns: * Regular, which has some minor overhangs in the barrel that interact with the thin walls to sometimes deform a little in printing. * Fully supported, which doesn't have a fully hollow barrel and extends the bottom bar all the way out to the tip of the nozzle, so the barrel in theory doesn't look quite as cool, but in practice won't deform as much so might look better after all (and the insides can be fully drilled out if desired). * Split, which print as two halves on end to be glued together, so supports aren't needed but t…

Frequently asked questions

Is this 3D model free to download?: Yes. Sentry Gun [28mm] is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link 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 rocketshipgames.
Who made this model?: Designed by rocketshipgames, 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.