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Rocket for UMAREX HDS 68

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3D model description

This defensive rifle uses a Co2 sparclette and can fire 2 .68 caliber rubber bullets (or Paintball) with an impressive 16 Joules of power!

I have created a new rocket-style projectile to replace the rubber bullet, and this in 4 models:

  • pointy-headed

  • flatheaded

  • hollow-headed

  • split head

This creation is composed of 3 elements:

  • a base 18.40 mm in diameter and 8 mm in height, which will hold the rocket in the barrel

  • a lid that is placed in the base (an attached STL file will allow you to print 20 copies in one go)

  • the rocket of 17.10 mm in diameter and ~254 mm in height


Place a cover at the bottom of the base.

Insert the fins of the rocket fully into the base: the assembly must be tight enough not to separate easily.

When firing, the rocket and the cover will be expelled, but the pellet will remain in the weapon and can be recovered for another shot (by adding a new cover).


WARNING: The use of this projectile represents a much greater danger of injury than the original rubber ball!

                   Here in France, if a possible aggressor is injured, you risk criminal prosecution!

                   Its use must therefore be purely recreational, just like the game of darts in bars!

My other creations for UMAREX HDS 68 :

  • Reusable cartridge :

  • Shoe cartridge for a diabolo .177 :

  • Balls:

  • Paper Cartridges :

To see all my other creations on this site, enter "oasisk" in the search window of this site

3D printing settings

layer: 0.20

IMPORTANT! A Raft is absolutely essential for the rocket because the printing starts with the fins and therefore with a very small area on the tray!

For the base and the 20xopercules, just a skirt to start the extrusion process.

filling: 100% for all

  • 3D file format: STL
  • Last update: 2021/02/28 at 14:21
  • Publication date: 2021/02/21 at 17:47



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