Ultradyne Adjustable Butt Stock Gen 2 Buffer Armor Black. Designed for shooters who demand precision modularity and reliable fit the Gen 2 Adjustable Butt Stock Buffer is a purpose-built stock that attaches quickly to any mil-spec buffer threaded rear mounting interface and pairs exceptionally well with our UD Chassis. Machined from a solid billet of 6061-T6 aluminum the stock offers smooth repeatable adjustments for cheek height and length-of-pull so you can dial in consistent eye-to-optic alignment and shoulder mount. Choose the fixed model for a stream-line lightweight option or the folding model for the ultimate compact carry and storage solution. Cerakote finish optional bag rider and made in specialized factories this stock makes your build more modular easier to pack and faster to configure in the field. Specifications for Ultradyne Adjustable Butt Stock Gen 2 Buffer: Manufacturer: Ultradyne Weight: 15.1 oz Features of Ultradyne Adjustable Butt Stock Gen 2 Buffer Attachment Method: Mil-Spec Buffer Threads Adjustable Features: Length of Pull and Cheek Weld Foldable Option Available QD Sling Mount Tension knobs for zero rattle Package Contents: Ultradyne Adjustable Butt Stock Gen 2 Buffer Ultradyne UD20184-AB: Adjustable Butt Stock Gen 2 Buffer Armor Black