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Description
The UMAREX HDS 68 defense rifle uses a CO2 powerlet and can fire two .68 caliber rubber bullets (or paintballs) with a power of 16 Joules.
It consists of three elements:
- the base (to be 3D printed)
- the cap (to be 3D printed) which seals the cartridge after loading the ammunition
- the case, a simple standard paper tube that is shaped on my calibration mandrel and glued with simple white glue (the mandrel is also to be 3D printed)
You can fill this cartridge with 6mm BBs (a dozen for 3.33 gr), 4.5 mm steel BBs, flour, pepper, salt, etc... knowing that the weight of an original rubber bullet is 3 gr
How to proceed:
- 3D print the bases, caps and calibrating mandrel
- Print an A4 sheet of paper with my file "imprimer étuis_68.pdf"
- Cut out each of the future cases with a cutter and a ruler
- Shape each of these tubes on the mandrel and secure it with white glue (like white glue in a tube)
- Glue each tube to a base with one or two dots of glue (I use an "extra-strong" paper glue). To guide the case and not damage it, I use the mandrel as a guide.
- Fill the cartridge with BBs
- Seal with a cap + 2 dots of white school glue
There you go, a cartridge is made!
Note:
When firing, the entire cartridge is ejected!
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License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.




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