DoubleStar Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss Black. These AR15 Stocks by DoubleStar are constructed out of 7075 T-6 aluminum making them lightweight yet sturdy enough to handle whatever you face in the field. The Doublestar AR-15 Folding Mechanism is compatible with both collapsible and fixed length stocks offering versatile ways to customize your weapon. This stock mechanism doesn't have the Boss which is the raised oblong shaped portion on the Arm. Upgrade your stock to what fits your shooting style best when you throw on this Doublestar Folding Mechanism for AR Type Stocks. Specifications for DoubleStar Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss: Manufacturer: DoubleStar Gun Make: AR Platform Color: Matte Black Gun Model: AR-15 Length: 4 in Gun Type: Rifle Condition: New Fabric/Material: 7075-T6 Aluminum Features of Doublestar Ace Folding Stock Mechanism with Integrated AR-15 Stock Interface Without Boss "Fold Direction: Left Boss: No" Package Contents: DoubleStar Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss The Doublestar Ace Folding Stock Mechanism With Integrated AR-15 Stock Interface Black A504 is a quality addition to the DoubleStar lineup. For more great deals on AR15 Stocks by DoubleStar please browse our Doublestar Gun Parts page. What firearm models does the manufacturer say DoubleStar Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss is compatible with? The manufacturer suggests that DoubleStar Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss is compatible with AR-15DoubleStar A504: Folding Stock Mechanism with Integrated AR-15 Stock Interface w/o Boss Black