TPU flap in the sound moderator

The valve of silence. It is intended for installation in the PCP sound moderator of a rifle or pistol.
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updated January 5, 2025

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I apologize for making a mistake with the location of the chapels. But I really don't want to redo it. The valve is under .22 cal for the moderator per 40x1,5mm pipe. I recommend printing the flap from a TPU filament. The material for the body and cone does not matter much, ABS, PetG, PLA can be used. 

I used a paper clip to assemble the axes. And a torsion spring, I used a 0,3x15x2mm 3coil spring. 

For the convenience of modification, the STEP file

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