I was lucky enough to have one of the last Tracker I barrels factory fitted to my 20 Ga. TDC. I then sent it out to be threaded for Carlson Tubes. Ordered X-full Turkey, IC and Mod chokes - love it. Works great on Deer, planning a Boar hunt with it next month and will be looking for a winter Turkey In North Carolina come January.
I think H&R could sell a ton of them.