The Mossberg MVP Flex in 5.56 NATO uses Mossberg's Flex TLS (Tool-Less Locking System) to allow rapid stock swapping without tools — the user can switch between youth, standard, and pistol-grip stock modules in the field. AR-15 magazine compatible. Targets families who want one rifle that physically fits multiple shooters. Type: Bolt-Action Rifle Action: Bolt-Action Caliber: 5.56 NATO Capacity: 10 Year introduced: 2014, USA Weight: 6 oz Overall length: 37" Status: Active Intended use: Hunting, Sport