Ultradyne Adjustable Stock Gen 2 Features The Ultradyne USA Adjustable Stock Gen 2 is machined from 6061 T6 aluminum giving it genuine rigidity and durability compared to standard polymer AR stocks. This aluminum construction holds its adjustment settings consistently over time which matters for shooters who want a repeatable length of pull from session to session. The stock attaches quickly to a 1913 Picatinny rail or a mil-spec threaded rear interface giving it broad compatibility across a wide range of chassis systems and buffer tubes. A length of pull adjustment range from 12.75 to 13.75 lets shooters dial in proper fit for their build body size and shooting position. An optional spacer kit extends the length of pull further to 14.75 giving taller shooters or those wearing bulky outerwear additional reach without needing a different stock entirely. The bronze Cerakote finish adds a durable wear resistant coating that protects the aluminum body from scratches and corrosion over years of use. Pairing exceptionally well with Ultradyne s own UD Chassis and Picatinny Chassis systems this stock is designed to complete a cohesive precision-oriented rifle build. For shooters seeking a rigid adjustable and genuinely modular buttstock the Ultradyne Adjustable Stock Gen 2 delivers a purpose-built solution. Ultradyne Adjustable Stock Gen 2 Specifications Manufacturer: Ultradyne Model: Adjustable Stock Gen 2 Type: Stock Material: 6061 T6 Aluminum Finish: Cerakote Color: Bronze Length of Pull: 12.75-13.75 (14.75 with spacer kit) Compatible Hosts: 1913 Picatinny Rail Mil-Spec Buffer Tubes Available At: GrabAGun