ULTRADYNE UD3 CHS CMB R700 SA RH BLK

The Ultradyne UD3 CHS CMB is a modern rifle chassis designed to replace the factory stock on Remington 700 short-action rifles, giving you a platform built for precision and versatility. Machined from solid 6061 T6 aircraft aluminum, this one-piece chassis delivers the strength you need whether you're building a lightweight hunting rifle or a serious long-range target gun. Right-hand configuration in black, it integrates the FAB Defense Gradus grip and accepts AICS-pattern magazines, making it compatible with a wide aftermarket ecosystem of parts and components.

Weight is one of the UD3's biggest advantages: the chassis itself tips the scales between 1.1 and 1.5 pounds depending on your specific configuration. That means you can keep overall rifle weight down if you're carrying into the field, or you can add optional weights to fine-tune balance and recoil management for the bench or range. The one-piece aluminum construction is rigid and repeatable—no bedding surprises, no stock shift under recoil.

The barrel channel accommodates barrels up to 1.35 inches in diameter, and the three-slot Picatinny rail system gives you room to mount optics and accessories exactly where you need them. Whether you're retrofitting a hunting rifle that weighs as little as 6 pounds or building a dedicated target setup approaching 16 pounds, the UD3 adapts to your needs. Pair it with an Ultradyne adjustable butt stock to dial in length of pull and cheek height without adding unnecessary weight.

Key Features

• One-piece 6061 T6 aircraft aluminum construction for strength and rigidity
• Integrated FAB Defense Gradus grip for control and ergonomics
• AICS magazine interface for broad aftermarket ammo compatibility
• Three-slot Picatinny rail for optics and accessory mounting
• Fits Remington 700 short-action rifles, right-hand configuration
• Minimal weight (1.1–1.5 lbs) keeps rifles light for hunting or long-range competition
• Barrel channel supports up to 1.35-inch diameter barrels
• Pairs with optional weights and adjustable butt stocks for customization

Specifications

Frequently Asked Questions

What Remington 700 models does the UD3 fit?

The Ultradyne UD3 CHS CMB is designed for Remington 700 short-action rifles in right-hand configuration. Verify your rifle's action type and orientation before ordering.

Can I use this chassis on both hunting and target rifles?

Yes. The UD3 weighs only 1.1 to 1.5 pounds and works well on hunting rifles as light as 6 pounds and long-range rifles up to 16 pounds. Its modular design accommodates different builds and shooting disciplines.

Is an adjustable stock included?

No. The chassis comes as a standalone component. Ultradyne offers an adjustable butt stock as a separate purchase to fine-tune fit and weight distribution.

What magazines are compatible with the UD3?

The chassis features an AICS magazine interface, which accepts AICS-pattern magazines and opens up a broad range of factory and aftermarket magazine options.