The file 'Glock Compensator With 11mm Thread For Tracers 3D Printer Model' is (stl) file type, size is 98.9KB.
I just open the inside holes a little to insure that nothing damage the slide and i put a 11mm thread to attatch the tracer.
Many thanks to the models autor:https://www.thingiverse.com/foxstrat/about
Models:https://www.thingiverse.com/thing:3882903