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Posted: 3/5/2006 11:42:21 AM EDT
What is the purpose of the two-tone finish on old Colt pistol mags, like original 1911 mags, etc.

The mag is usually blued from the bottom up to a little above halfway, then it's greyish. What was the reason for this. Also seen it on old 1903 pocket pistol mags.
Link Posted: 3/5/2006 11:53:20 AM EDT
the grayish part was heat treating
Link Posted: 3/5/2006 8:56:19 PM EDT
ok, do you know the purpose of heat treating the top half only?
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