Is this 3D model free to download?

Yes, M870/M8876 M4 Mag Adapter 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 dominicwilfong, 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.

M870/M8876 M4 Mag Adapter 3D printable model by dominicwilfong

M870/M8876 M4 Mag Adapter

Source: Thingiverse by dominicwilfong

The M870/M8876 M4 Mag Adapter is a free printable 3D model from Thingiverse by dominicwilfong. Mine was too loose and I didn't like the release being on the side because I would randomly eject my mag on accident. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

30 saves Source: Thingiverse Updated 2026-10-02 License: CC-BY-SA · commercial OK Category: Outdoor & Garden

Tags: airsoft, airsoft accesories, Airsoft accessories, airsoft adapter, Airsoft Adaptor, airsoft attachment, airsoft gun, airsoft mag adapter, Airsoft magazine, airsoft parts, airsoft shotgun, Golden Eagle, Golden Eagle M8876, jg golden eagle, m4 airsoft

About this model

Mine was too loose and I didn't like the release being on the side because I would randomly eject my mag on accident. The retention device snaps into place with the triangular piece facing the opening for the mag, and the lever uses like half of a pen spring. I suggest printing on the flat (top) of the adapter, and the flat side of the lever and retention device.

Frequently asked questions

Is this 3D model free to download?: Yes. M870/M8876 M4 Mag Adapter 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 dominicwilfong.
Who made this model?: Designed by dominicwilfong, 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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