The SGA  is an adaptable stock for Remington 870 and Mossberg 500/590/590A1 12 gauge shotguns, designed with a wide range of customizable features and accessories to meet individual end-user needs. The MOE Forend is a simple, lightweight forend for 870 & 500/590/590A1 12 gauge shotguns with 7-5/8" action tube assemblies, designed to provide much-needed adaptability with the attachment of optional MOE accessories and mounts. NOTE: The Remington will NOT work on the Remington 870 Super Mag; and the Mossberg forend in the sets will NOT fit the Mossberg 500 with 6-1/2" action tube assembly or the Maverick or current production Mossberg 500 synthetic with pinned-in action tube assembly without replacing with the 7-5/8" action tube assembly (631-000-023).