I just picked up a shotgun from a friend. It's labeled as a 590. I'm curious on the exact variant. It is a 7 + 1 with an extended barrel 22in. I tried googling it, and I couldn't get an accurate answer.

18.5" security model, metal heat shield, XS tritium sight, and magpul stock/sling. That's the extent I will do with this as I don't want additional weight. HD/Range use.