Quote:
Originally Posted by flintsghost
I think you need a 4013 that is a single stack to make a 1013 but I really don't know for sure. The TSW is a double stack.
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Yup- The 8-shot early 4013 (and the rare-ish 4014) were built on a single-stack .45 frame and used modified 10XX mags (shorter length with a cartridge OAL gap spacer). These guns can be converted to 10 mm in a straight forward process. The later 9-shot 4013 are built on a 69XX size frame, and can't go to 10mm.