Personally, I haven't had it done to my gun. From what I hear it is the same trigger they use on the USP Tactical and Expert and it costs about $100 for the conversion from H & K. Don't know if they would send you the parts for your own gunsmith to do the conversion. You may want to ask the same question over at the H & K board. No password needed over there, just type in your question. That's about all I know.