Big 500 fan here...
I love the 500 series and the ability to easily change configurations to suit my needs. Have spent many hours searching the web for barrels and accesories. Mossberg makes a 20in plain bead barrel, a 28" vent rib barrel with screw in chokes, and a 20in rifle sighted barrel for the extended mag tube version.
No rifled barrels have been made for these that I can locate, and I have looked ALOT.
Gator has the right idea about gettting a shorter mag tube. Then you have access to all sorts of rifled and/or ported barrels. They are very easy to swap out once you get them unscrewed for the first time.
Patrick
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