There is nothing...yet. There was some prototypes in the past, but they were dropped. Scott (from Springer Precision) says that there are some in the works, but can't disclose any details. Hopefully we will see something this year!
It truely amazes me that a company doesn't find it profitable to manufacture such a kit. There are .22lr conversions for all kinds of guns, and different brands of kits for the same gun. You would think that the first company to produce such a product for the xd models would be in a gold mine! There has got to be thousands upon thousands of XD owners that would purchase such a kit.
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