Yesterday at a gun show I was approached by an acquaintance who showed me a Type 14 Nambu dated 19.8, with a heavy barrel which appeared to be about 7" long. He said it was chambered for 9mm Parabellum, and I could see he was looking for an offer. I looked it over out of curiosity, and judged that it seemed to be a workmanlike alteration. I could not discern if the magazine had been altered. I did question if the Nambu was strong enough to handle the more powerful cartridge, and was told that the original springs were probably replaced with heavier ones. Anyway, I declined to make an offer, and later saw the pistol for sale on a friend's table with an asking price of $650, which I am sure was highly negotiable. He told me that it was sold yesterday to the fellow who showed it to me, but it was returned because the buyer claimed it would not properly chamber a 9mm round. Has anyone ever seen this alteration before, and if so, can it be made to function reliably and safely with the 9mm cartridge?