For sale in WR: Mossberg 500 ATP 12 ga. 7+1 capacity with 20" barrel and bayonet lug. Asian re-import so it is a little rough on the outside but nice on the inside. The ATP was the predecessor to the 590. One can use regular 500 barrels, but the magazine tube needs to be switched to the 5 shot version which is easy to do since the tubes are threaded into the receiver. $120
More photos on request.