The 590 has the longer magazine tube and higher capacity.
There is not and extended mag option with a 500 (short of replacing the entire mag tube).
The 590 has the longer magazine tube and higher capacity.Thinking of getting a shotgun soon. Most likely a Mossberg. I know the primary differences between a 590A1 and a 500 are that the 590A1 was built for military duty (Thicker barrel walls, metal triger gaurd and safety). I didn't know if I needed the heavy duty barrel, and I know I can replace the trigger gaurd and safety on the cheap. So is there a real advantage to getting the 590A1. There seems to be a pretty big price difference.
That's a decision only you can make.The 590A1 model I was looking at was the 51660 9 shot ($457), the 500 model was the 50577 8 shot ($313). I did not know if it was worth the $144.00 difference for 1 more 2 3/4 shell, metal trigger gaurd, metal safety and heavy duty barrel.
I spend a lot of time on GoG great gun search features. I think I truly want a 590A1, though the surfacing of the XDm .45 may put this plan on the back burner. We will see.I was in your shoes about 3 months ago and eventually settled on a 590 (model # 50660). There were several Mossbergs on sale through Gallery of Guns, and I was able to get mine for $380 after taxes and transfer fees. At that price, I couldn't pass up the 9-shot capacity, heat shield, bayonet lug, etc.
It looks like their model # 50645 is on sale until January 31st. Prices will vary based on your local dealers though. I'm pretty sure the 50645 is the same as the 50660, but the 50645 is blued and the 50660 is parkerized.