Glock 9 x 19 +3 OEM Magazine Extensions

+3 Magazine Extensions for 9 x 19 Glock 17 OEM Magazines
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updated March 8, 2026

Description

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+3 Magazine Extensions for 9 x 19 Glock 17 OEM Magazines.

 

Additional Hardware Required:

 

Recommended Print Settings:

  • 4+ Perimeters
  • 100% Infill
  • 0.15mm Layer Height

 

Instructions:

  1. Disassemble the magazine
  2. Remove the two lugs on the bottom of the magazine with a sharp knife or dremel tool. 
  3. Use a soldering iron or a long M3 screw + a heat source to heat and seat the threaded inserts into the provided 4mm blind holes.
  4. Reassemble the magazine using the original spring and spring retaining plate.
  5. Lock the extension in place with two M3 x 6mm screws

 

Local laws apply

 

If you need anything, feel free to reach out! Questions/Suggestions/Criticism is highly appreciated. Happy Printing…

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Model origin

The author marked this model as their own original creation.

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