Product Description The Ultradyne USA UD Gen 2 Adjustable Butt Stock is a precision-engineered, modular stock built for shooters who demand reliability, modularity, and a perfect fit. Machined from durable 6061 T6 aluminum and finished in a resilient Cerakote black coating, this stock is designed to endure demanding conditions without compromise. It attaches quickly to any 1913 Picatinny or mil-spec threaded rear mounting interface, offering broad compatibility across rifle platforms. The Gen 2 design pairs exceptionally well with the UD Chassis and Picatinny Chassis, while its folding capability and adjustable length of pull deliver the ergonomic flexibility serious shooters require. Product Highlights Machined from 6061 T6 aluminum for a lightweight yet rugged construction that stands up to heavy use Compatible with both 1913 Picatinny rail and mil-spec buffer tube interfaces for versatile platform integration Adjustable length of pull from 12.75" to 13.75", extendable to 14.75" with the optional spacer kit Cerakote black finish provides outstanding corrosion, wear, and chemical resistance Folding design enhances portability and compact storage without sacrificing rigidity when deployed Specs Brand: Ultradyne USA Model: UD Adjustable Butt Stock Gen 2 Material: 6061 T6 Aluminum Finish: Cerakote Black Stock Interface: 1913 Picatinny or Mil-Spec Buffer Tubes Length of Pull: 12.75" - 13.75" (14.75" with spacer kit) Type: Folding Adjustable Butt Stock MPN: UD20168-AB UPC: 810140664198 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer.