Magpul offers a full line of Mossberg shotgun accessories.

The SGA Stock for Mossberg 500/590/590A1 is ambidextrous and configurable, featuring a spacer system for length of pull adjustment, enhanced grip ergonomics, a recoil-reducing butt-pad, optional cheek risers for use with optics/raised sights, and a variety of sling attachment options.

The MOE Forend for Mossberg 590/590A1 is a drop-in for Mossberg 590/590A1 shotguns, featuring an extended length and front/rear hand stops for improved weapon manipulation. Compatible with MOE rails, mounts, and accessories, the MOE Forend adds modularity to the proven Mossberg platform.

The SGA Receiver Sling Mount for Mossberg 500/590/590A1 is a sling attachment point designed for one-point slings with clip-in style attachments such as the MS3 Paraclip, the HK hook, ITW MASH hook, and others. Made from precision cast steel and Melonite® finished for wear and corrosion resistance. Dedicated fit for the Magpul SGA Stock, can be installed on either the left or right side depending on user preference.

The Forward Sling Mount for Mossberg 590A1 and Forward Sling Mount for Mossberg 500/590 are clamp-style sling attachment points that can be configured for use with either Push-Button QD Sling Swivels or one-point clip-in style attachments such as the MS3 Paraclip, the HK hook, ITW MASH hook, and others. Made from precision cast steel that is Melonite finished for wear and corrosion resistance. MAG493 is a dedicated fit for Mossberg 590A1 models with factory extended magazine tube and will not fit other Mossberg models, and MAG508 fits Mossberg 500s, 590s, and Remington 870s

See more at http://www.magpul.com/.