Yes, I'm sure anything with the that brandname would be a hot seller in the US.
(Sorry, I'm no help with your question though).
With the shotgun I always liked that you can add air to stiffen the shotgun at any height
Not sure if the slam tail works the same.
JD has a pretty decent following of customers in the US and abroad.
+1 with what Ralphski says. Had Shotguns on my Heritage. Best value for money you can get, and brilliant customer service.