Kalibrgun swapping barrel

[aldea6]

Hi , did somebody already try to put another barrel in order to shoot slugs with Kalibrgun Cricket 1st generation. I would like to find a CZ barrel of same OD , coming from guns like AGT , RTI , Taipan....with a minimum of machining to adapt on the Cricket ; maybe some FX could do the job.

Did you try to do this before ?

Thanks