I live in California where buying an "off roster" gun is no longer an option using the single shot exemption that was phased out several years ago. Therefore, I would like to convert my .40 PPQ 5" to the 9MM using the Q5 Match conversion kit. I had called the Walther customer service line several months ago, and they said the only thing that is different between the .40 and the 9MM is the slide assembly and the sear housing assembly (item 32 in the parts list). It seemed like a simple swap so I called again a few weeks ago to order the parts and the Walther customer service representative said that the frames are different between the .40 and the 9MM and I couldn't just swap the sear housing assembly and the slide assembly to convert from a .40 to a 9MM. Has anyone tried this or know if this can be done? Why would the frame be different?
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