3D Printable Glandes Moulds | Concrete Sling Projectiles

Digital STL files for 3D printing glandes moulds. Make consistent concrete sling projectiles in 2:1 or 2.5:1 ratios. Includes full instructions.

The mould cavities are sized to make consistent concrete projectiles with ease. For ease of use, the two mould halves can be quickly screwed together with M4 Bolts and wing nuts. Two styles are available- stubbier 2:1 for more robust glandes and 2.5:1 for improved aerodynamics. 

The detailed PDF has all the 3D Printing and assembly instructions, as well as recommended formulas for various casting materials. Printing the moulds is easy and the models will fit a variety of different printer sizes. The moulds can also be used to cast other materials like Epoxy or Plaster

Sizes

Not sure what size is right for you? Grab the Bundle or check out this quick guide:

• 60g: Great for long distances.
• 90g: A good all-round size for general slinging.
• 120g: Heavier for excellent short range accuracy.

What's Included:

• .stl files for all mould parts
  
• Pdf file with detailed printing profile, assembly, and casting instructions.

Required Materials (Not included):

• PETG Filament
• 3D Printer with 18x18x18cm Build volume minimum
• M4x15 Star Grip screws or wing nuts
  
• M4 Prong nuts/T-nuts - DIN 6930
• Casting material as desired

© 2026 Blackthorn Ballistics. All rights reserved. These files are licensed for personal use only. Redistribution, resale, or commercial use is prohibited.