Glock 20/21 Frame dd20.1

dd20.1 3d glock 21 20 10mm

Glock 20/21 Frame dd20.1 STL Files

The dd20.1 is a 3D printed Glock 20/21 frame

Glock 20/21 Frame dd20.1 Details

Are you looking for a new challenge in 3D printing? How about building your own custom Glock 20 or Glock 21?

The dd20.1 is a 3D printed gun frame for two “big boy” Glock models that are popular among gun enthusiasts.

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The G21/20 are known for their power and reliability, and building your own using 3D printing technology can be a fun and rewarding project.

The dd20.1 Glock 20 is the 3D printed 10mm variant often referred to as the “bear killer” for its stopping power and size.

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P80 PF45 10mm / .45 Frames

The black PF45 Large Frame 80% pistol frame by Polymer 80 is the perfect base for your next G20SF (10mm) / G21SF (.45) handgun build.

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This frame is also compatible with the Glock 21 .45 ACP variant is often admired for its use in two world wars.

Glock 20/21 dd20.1 in the Wild


3d printed 10mm glock


Glock 20/21 dd20.1 Tech Specs

Required Parts for the Glock 20/21 dd20.1


  • DD17.2 spec rails
  • Full-size gen 3 locking block (same as DD17.2)
  • Gen 5 Glock takedown lever spring (many pen springs will work, should be around 3mm x 10mm)
  • Large frame Glock 21/20 lower parts kit (.45/10mm)
  • Large caliber magazine of your choice
  • G20/21 compatible upper

Materials Required

The dd20.1 requires basic gunsmithing tools and a 3D printing setup.

Using a dialed-in Ender 3 with widely available PLA+ filament will get the job done.

Tools Required

  • Gunsmithing Punch Set
  • 3D Printer
  • Slicing software with a decent computer
  • Drill bits for cleaning out holes.
  • Hammer
  • Flathead screwdriver

Suggested 3D Print dd20.1 Settings

The slicer settings for the 3D-printed Glock 20/21 are similar to the majority of setups for other 3D gun builds:

Nozzle: 0.4mm

Layer Height: 0.16mm

Temp: 220/60C

Infill: 100% (or 999 walls)

Supports: On/full (tree supports are ok) – use a close support interface gap. Your interface gap should not be larger than 0.16mm unless you know what you are doing with your setup.

Cooling fan: 20% normal, 50% on bridges. Off for the first 10 layers. Keep the fan low to prevent warp.

Bed Adhesion: gluestick or hairspray or both


  • PLA+ (eSun, Polymerk or simular
  • Optional: Zytel (Requires Zytel compatible 3D printer setup)

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