Is this 3D model free to download?

Yes, HPA buffer tube holder is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Cults3D. Use the "Download from Cults3D" 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 SeiTheInsane, published on Cults3D. 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.

HPA buffer tube holder

Source: Cults3D by SeiTheInsane

The HPA buffer tube holder is a free printable 3D model from Cults3D by SeiTheInsane. I have had terrible luck with stock guide rods interfering with grip lines, so I decided to design and print a replacement which is much shorter. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Cults3D

30 saves Source: Cults3D Updated 2026-10-17 License: PRIVATE-USE · non-commercial Category: Toys & Games

Tags: airsoft, gearbox, hpa

About this model

I have had terrible luck with stock guide rods interfering with grip lines, so I decided to design and print a replacement which is much shorter. The inset is designed to hold an m5 nut with a radius of 4mm.

Frequently asked questions

Is this 3D model free to download?: Yes. HPA buffer tube holder is free to download from Cults3D. Open it in the free Thinger app, or use the "Download from Cults3D" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Cults3D, not by Thinger. We link you directly to the original listing by SeiTheInsane.
Who made this model?: Designed by SeiTheInsane, published on Cults3D. 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.