Mossberg 500 persuader 8 shot

Mossberg 500 Persuader 8 shot Security Series 50580 Holds 8 - 2 3/4 inch shells or 7 - 3 inch shells. I bought it new and added the ProMag PM111F Stock Assembly Set, here's what it is: it provides the Mossberg model 500 12 gauge pump shotgun with a AR-15 M4 (6) position collapsible stock and tactical pistol grip. The set also includes a polymer forearm with Picatinny rails and a removable vertical foregrip. Up to six additional shotshells can be carried on the stock with the removable shell holders. I bought a case for it which is the Redhead brand with the soft foam inside. I also bought a sling or strap which holds 25 shells, the gun holds 8 and the extra 6 that the ProMag holds is a total of 39 shells that are attached to the gun. There's 1 box of 3 inch Remington slugs and 5 boxes of 2 3/4 inch shells that go with it. I'm asking $400 for everything. The gun is like it was the day I bought it except for the extras I added on to it. It's been in the case, in the air conditioning and in the closet. Email me for more pictures.