Ultradyne UD6 Rifle Chassis Short Action 6 Slot

Ultradyne machines this chassis from a solid bar of aluminum as one piece, which is the short answer to why it is stiff. Depending on the model the finished chassis runs between 1.1 and 1.5 pounds, light enough to sit under a 6 pound hunting rifle and rigid enough for a 16 pound target gun.

The UD6 is the 6 slot version. It takes AICS pattern magazines, clears barrels up to 1.35" in diameter, and comes with a FAB Defense Gradus grip. Paired with the Ultradyne adjustable butt stock it still weighs less than most factory stocks, and optional weights let you add up to 5 pounds if you would rather build the rifle heavy for a match.