Ultradyne UD5 Chassis Ruger American SA RH Armor Black. The one-piece design weighs between 1.1 and 1.5 pounds depending on the model. When paired with the Ultradyne Adjustable Butt Stock it is lighter than most factory stocks yet has the ability to add up to 5 pounds with optional weights.The Ultradyne Chassis is packed with features including an adjustable magazine release lever compatibility with AICS magazines ability to work with any Mil-Spec butt stock a built-in Arca rail M-LOK slots on three sides and Dynalock technology to ensure a secure fit. The action is held in place with V-channel bedding that can accommodate free-floated barrels up to 1.35 inches in diameter. Specifications for Ultradyne UD5 Chassis: Manufacturer: Ultradyne Finish: Cerakote Hand: Right Gun Rail: M-LOK Features of Ultradyne UD5 Chassis Butt stock Interface: Mil Spec Grip Interface: Mil Spec A2 Magazine Interface: AICS. 1.35 Max. Barrel Diameter. Forend: Integrated ARCA Rail and MLOK Slots Package Contents: Ultradyne UD5 Chassis What firearm models does the manufacturer say Ultradyne UD5 Chassis is compatible with? The manufacturer says that Ultradyne UD5 Chassis is compatible with Savage Model 110 Remington Model 700 Tikka T3 Howa 1500 Ruger American RifleUltradyne UD20134-AB: UD5 Chassis Ruger American SA RH Armor Black