This is a remix from: https://www.thingiverse.com/thing:4404985
The silencer is pretty awesome but the original model was made so it's one piece instead of 2 and if you want to turn the outer part upside down, the inner would be floating mid-air. So I put it in blender and separated them for convenience. I don't think many people will download it but hey...
Original says for VZ61 scorpion but it has M14x1,25mm LH or, put simply, 14mm CCW thread so it fits any gun that has internal threads like that. The silencing part actually works because the model has a small hole on the inner part and a portion of the air escapes there so it does actually suppress a little and attenuates the sound