I just took the plunge on a Mossberg M590A1 model number 51663. I ordered it tonight and should have it mid-week. I have been in the market for a solid performing HD shotty and I think this will fit the bill nicely. It has a heavy walled barrel, 8+1 capacity and ghost ring sights. I believe it is the same one the US Navy uses. I got a box or two of Poly Shok shells that I am looking forward to testing. Range report to follow. I paid $399 + tax and my FFL waived the fee because I do a lot of business with him.