hopup with flash hider
thingiverse
This design is derived from a source found on grabcad.com/library/flashhider-for-ar-15. I've made modifications to accommodate standard gelblaster inner tubes by adjusting the diameter to 9mm and 7.5mm. Please note that this design has not been thoroughly tested, so use it at your own risk. An M3 screw is used to adjust the hopup angle and secure the attachment to the barrel.
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