Pro Mag Mossberg Model 500 and 590

Stock assembly provides the Mossberg model 500/590 12 gauge pump shotgun with a AR-15 M4 six position collapsible stock and tactical pistol grip. 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. Constructed from injection molded black polymer. All mounting hardware included. Forearm for Mossberg 500 series 12 Gauge Pre 2008 Production. Forearm will not fit new Mossberg 500 12 Gauge shotguns or the new pinned action bar (Maverick 88 style) forearms.