The Flex 500 Hunting series is a Modular System of shotguns based on the legendary model 500 with Mossberg's Tool-Less Locking System. This system consists of three convenient connecting technologies, that come together to bring another level of flexibility to your hunting and sport shooting endeavors. One locking pin is for the stock, one for the forend, and one for the recoil pad. The Flex Hunting series is set up for any of your shotgun's hunting needs but easily allows you to change the stock, forend, or recoil pad for a specific need. All Hunting Series feature a ported barrel or ported choke, a camo stock, and adjustable 3-dot fiber-optic sights.