Check the listing for details. Aluminum Base Polymer Side Saddle Mossberg 500 590 Shotgun Shotshell Carrier. Color: Black, Condition: New. Listed at 18.95 USD. Tactical Scorpion Gear Aluminum base Polymer Mossberg Shotshell Carrier Tactical Scorpion Gear polymer shotshell Superior Material : Made of durable law enforcement grade polymer materials The combat-proven aluminum based polymer six shotshell carrier is a step forward in design and technology. State of the art design, injection molding and space age high-density plastics are combined to create this which cannot be duplicated in any other material.Elastic polymer rods helps keep shotshells in place. Designed for military & police personnel. Great for civilians & off duty officers. Modular: mounts directly to the side of the weapon for quick access to shells Part number: TSG-SCM Weapon compatibility: Mossberg 500, 590 , 590da ect 12 gauge shotguns "original wood forearm may need alteration on 500a", Maverick 88 Color: Black Material: Durable law enforcement grade polymer Package: 1 shotshell carrier, screws and allen wrench Handing : none