The toughness of Maxim Defense Picatinny Rail Mount Stocks are available for your AR style rifles. Built with the same functionality and durability as their best-selling Gen-6 and Gen-7 stocks for AR-15" your Picatinny Rail Mount stock finally has a brace option suited for real-world use. Solid attachment" quick deployment" and 5-positions of adjustment make this the perfect choice for your hard-use carbine.