ULTRADYNE UD6 CHS CMB RGAM SA RH BLK

The Ultradyne UD6 chassis is a precision rifle chassis built from a solid bar of 6061 T6 aircraft aluminum, engineered for shooters who demand strength without unnecessary weight. Whether you're building a lightweight hunting rifle or a heavy-duty long-range target gun, this one-piece aluminum chassis adapts to your needs—it works equally well on nimble 6-pound rigs and substantial 16-pound setups. At between 1.1 and 1.5 pounds depending on your configuration, it leaves you plenty of weight budget for barrel, action, and optics.

The UD6 features six picatinny slots for accessory mounting, a FAB Defense Gradus grip for control and comfort, and an AICS-pattern magazine interface that keeps you compatible with standard AICS mags. The one-piece design means no flex, no rattle, and no guessing—just solid aluminum doing what aluminum does best. The barrel shank will accept barrels up to 1.35" in diameter, covering most custom and factory profiles you'll encounter.

Pair it with an Ultradyne adjustable butt stock to fine-tune length of pull and cheek height while staying lighter than factory stocks—or load it with optional weights to dial in your balance point. Built for hunters, long-range competitors, and precision rifle enthusiasts who understand that the foundation matters.

Key Features

• One-piece 6061 T6 aircraft aluminum construction for strength and durability
• Weighs 1.1–1.5 pounds depending on configuration
• Six picatinny slots for rails, bipods, and accessories
• FAB Defense Gradus grip for enhanced control
• AICS magazine interface for standard AICS ammunition compatibility
• Accommodates barrels up to 1.35" diameter
• Right-hand configuration
• Supports rifles from 6 pounds to 16 pounds

Specifications

Frequently Asked Questions

What magazines work with the Ultradyne UD6 chassis?

The UD6 uses an AICS-pattern magazine interface, so it's compatible with standard AICS magazines widely available for precision rifle builds.

Is this chassis suitable for a lightweight hunting rifle?

Yes. At 1.1–1.5 pounds, the UD6 is designed to work on hunting rifles as light as 6 pounds, making it an excellent choice for backcountry and mountain hunters who value every ounce.

Can I add weight to this chassis?

Yes, you can pair the UD6 with optional weights to add up to 5 pounds of mass, useful for managing recoil and balance on lighter builds or when you need extra stability.

What size barrels does this chassis accept?

The UD6 accommodates barrels with a shank diameter up to 1.35", covering most common factory and custom barrel profiles.