#1- ASM/CVA 1981 (By date on instruction literature) Self assembly Kit .36 Navy revolver. #2 ASM/CVA 1984 (by serial number) The cylinders on both guns are threaded 5x.8 S.I. metric. Both were sold with nipples threaded 6x1 S.I. metric. The kit gun was only partly assembled, with just the one nipple fitted. The assembled gun had five 6x1nipples threaded into the 5x.8 threaded chambers, and in the sixth chamber the thread for the nipple was stripped, for the full length through to the chamber. On examination after difficult removal, all the nipples showed thread damage, as did the first two or three threads in the cylinder chambers, that were fitted with nipples. My research has not located any nipples listed as 5x.8 thread. And the listed nipple thread for both firearms is 6x1mm. Neither gun came to me from the same source, and did not show evidence of machining or alteration to the cylinder thread. Thank you for any input, thoughts and observations.