Ultradyne UD3 Combo Chassis Features The Ultradyne UD3 Combo chassis is machined from a solid bar of 6061 T6 aircraft aluminum giving it exceptional strength while keeping the one piece design lightweight at between 1.1 and 1.5 pounds depending on the specific model. This makes the chassis suitable for hunting rifles weighing as little as 6 pounds as well as long range target rifles up to 16 pounds. An AICS magazine interface provides reliable feeding and compatibility with widely available aftermarket magazines while a 3 slot design keeps the forend accessory ready. The 1.35 inch max barrel diameter accommodates most factory and aftermarket barrel contours without interference. The included FAB Defense Gradus Grip gives shooters an ergonomic adjustable gripping surface that pairs well with the chassis s overall design philosophy. When combined with the Ultradyne Adjustable Butt Stock the complete system is lighter than most factory stocks while retaining the ability to add up to 5 pounds of weight using optional accessories. Built specifically to fit the Ruger American Short Action the UD3 Combo drops in without requiring gunsmithing. Finished in matte black for right hand shooters this complete chassis package is available for sale at GrabAGun. Ultradyne UD3 Combo Chassis Specifications Manufacturer: Ultradyne Model: UD3 Combo Chassis Color: Black Finish: Matte Material: 6061 T6 Aluminum Included: Chassis Butt Stock Grip Compatible Hosts: Ruger American Short Action Available At: GrabAGun