This little piece was created for an airsoft silencer.

The end of the barrel was wobbling in the silencer because the thread was a little worn out, so I created this little adapter to stop it from moving.

It goes in the end thread and onto the airsoft guns barrel.

To adjust it you can set different parameters in the openScad file (the values:

$ext_diam = 6;  //the external diameter of the nozzle - this is the internal diameter of the silencers cap

$int_diam = 5;  //internal diameter of the nozzle - this will be the external diam of the airsoft barrel

$base_diam = 10; //the diameter of the end part (base)

$int_lenght = 26; //length of the barrel

If you just want to make an adapter for something else feel free to thinker around with the Scad script.