The Ultradyne UDX adjustable folding buttstock for Picatinny in Armor Black is a billet-machined stock that attaches to any 1913 Picatinny interface (Ultradyne part no. UD20168-AB). It is machined from solid 6061-T6 aluminum and finished in Cerakote, with smooth, repeatable adjustment for cheek height and length of pull so your eye lines up with the optic every time. This folding version collapses for compact carry and storage, and it pairs with the Ultradyne UD and UDX chassis. It suits precision builds, hunting rifles and field setups where fit and portability both matter.

Key Specifications

• The mounting interface is 1913 Picatinny, so the stock attaches quickly to a Picatinny rear mount.
• The configuration is folding, which shrinks the rifle for packing and storage.
• Length of pull adjusts through 12.75 to 13.75 inches, a one-inch range for dialing in shoulder fit.
• The cheek rest adjusts 0.9 inch vertically and 1.0 inch horizontally, which lets you set a consistent eye-to-optic alignment.
• The stock is machined from a solid billet of 6061-T6 aluminum, a strong, lightweight material for a precision stock.
• The finish is Cerakote in Armor Black, a durable coating that resists wear.
• Weight is 16.5 ounces for the folding Picatinny version, light enough to keep a rifle balanced.

Frequently Asked Questions

Does this stock fold? Yes. This is the folding Picatinny version of the UDX Buttstock, which folds for compact carry and storage.

What does it attach to? This version attaches to a 1913 Picatinny interface. Ultradyne also sells buffer-tube versions of the UDX Buttstock, which are different part numbers.

What can I adjust on it? Cheek height and length of pull are adjustable, with a 12.75 to 13.75 inch length-of-pull range, so you can set up consistent eye-to-optic alignment.

Buy the Ultradyne UDX Adjustable Folding Buttstock

If you need a stock that folds, adjusts and stays rigid, the UDX folding buttstock covers all three in a billet aluminum package. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and browse more rifle stocks while you are here.