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.Features :WEIGHT: 16.6 ozMATERIAL: 6061-T6"LENGTH: 4.5" closed 5.75" 1st position 6.9" 2nd position 8.13" 3rd position 9.28" fully extended,,MAXIMUM RAIL WIDTH (INNER SPAN): 1.18";"ROD WIDTH: 1.5" center to center,The Maxim SCW stock is for a variety of rifles that have a rear facing 1913 Picatinny rail mountEach Picatinny Rail Stock comes with a QD sling mount installedExtension tube doubles as watertight storageVertically adjustable in order to get the exact location of the stock so that the rods do not interfere with the controls of your rifle