This is an adaptor to allow the fitting of silencers or barrel extensions to the TM VSR10 Pro (Not Gspec) or JG BAR 10.
I have also designed in an installation tool to make it easier to thread onto the barrel.
I have not tried this file on a VSR as sadly I no longer own one however the dimensions where taken from a left over adaptor I still have.
This was mostly a thought experiment but will hopefully be useful to someone.
Enjoy
I have more files available or at https://cults3d.com/en/users/AirsoftProtoTech/3d-models
3D PRINTING SETTINGS I would recommend 4 walls for both parts and at least 50% infill for the adaptor itself, the tool will likely only need 15% (so long as you don't use your monkey strength to tighten the adaptor down)
PLA+ or better for material
The adaptor will need supports, the tool will likely print fine with the large face on the print bed.