[quote author=6B4E555445200 link=1591582829/0#0 date=1591582829]Here is an article on a Winchester single shot musket set up to feel like a Krag rifle. It could be supplied threaded on the barrel to receive a Krag rear sight.

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Not all that uncommon if you hang out with the single shot enthusiasts.  Very early muskets had Hotchkiss sights.  The magazine illustration is a pre-1904 "1st model Winder" with the Krag sight about where it would be on a Krag.  2nd model (1905-1917) had the Krag rear sight moved back, placed right in front of the receiver ring. 3rd model (1917-1921) replaced the Krag rear sight with a much better Lyman Mod. 53 aperture sight.   How many made?  My guess is 20,000+.

Go to ASSRA forum and search for "Winder musket".