Big 5 Sporting Goods is having one of their periodic sales on Mossberg shotguns this week. I purchased the 28" vent-rib/18 1/2" Security barrel 12 guage combo for $289.99. This is not a model you'll find in the Mossberg catalogue, but it is a 500 and labeled as such. It has the capacity for 5+1. I was all set to buy a Winchester SXP but this price swayed me. This Big 5 combo differs from the standard Field/Security combo in several ways, I believe: The 28" barrel is not threaded for accu-safe chokes; instead, it has a fixed Modified choke the stock is synthetic rather than wood It has a different action slide assembly, with no action slide tube but rather with bars pinned to the forearm itself Big 5 is also selling Mossbert Security shotguns (8 round capacity) for the same $289.99 price.