If you own a Eshooter Flare M Tracer Unit (https://eshooter-world.com/products/eshooter-flare-m-tracer-unit) and want to fit it inside the mock suppressor try this file, I don't have this tracer so can't test it. 

TEST PRINT A SMALL PIECE to check if inner dimater is  sufficient to fit the tracer. You might have to use compensation in slicer to achieve correct size.

Comment how it fits/works. 

Remember it is a prototype.