So Big5 is running a shotgun sale again this week and I'm probaby going to buy one after work tomorrow. In the picture, the one that comes with the 2 barrels is a 500 (i think.) Question is: how many shells does it hold? I'm kinda leaning toward the "Security" version (which I think is a 590, but not sure) because when I was rereading the old Rem 870 vs. Moss 500/590 threads, most people said to get the 590 over the 500 because of capacity and build quality. This will probably be my only shotty until I can get a saiga and convert it, and I want to use it for HD as well as clays. I really like the long barrel option on the 500 because I don't know how well I can shoot clays with the 20 inch "Security" model. Any opinions on which to get?