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The stock attachment is quite similar for both these guns and many have added a 'tactical' stock intended for the Mossberg 500/590 to the JCH mdl 20. The contour of the receiver does not align well so you can build up a plastic or metal stock fitting to look good and paint it to match. The JCH receiver is taller than the Mossberg. Also, the tang of the trigger guard/trigger group extends into the stock more on the JCH than on the Mossbergs - so you have some cutting to do. The wood stocks will work but it would be difficult to build up the top edge of the stock to match the JCH contour.

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12y ago

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