Proof Research 260 Rem 18" 1:8 Twist 5-Groove Carbon Fiber Bolt Action Barrel (Model 138946)

The Proof Research 260 Rem 18" 1:8 Twist 5-Groove Carbon Fiber Bolt Action Barrel brings match-grade precision and lightweight durability to modern bolt action platforms. Built for shooters who demand accuracy without compromise, this pre-fit barrel combines Proof Research's engineering with the weight savings of carbon fiber construction—ideal for hunters, long-range competitors, and shooters who value every ounce without sacrificing rigidity or repeatability.

This 260 Remington barrel features a 1:8 twist rate engineered to stabilize a wide range of projectiles common to the cartridge, making it versatile for both hunting and precision shooting. The 18-inch length balances velocity and maneuverability, while the 5-groove rifling provides proven performance. The barrel arrives with a 5/8"-24 tpi threaded muzzle, ready for suppressors, muzzle brakes, or other threaded accessories. As a drop-in design, it's engineered for direct fitment to Sig Cross platforms, minimizing gunsmithing and getting you to the range faster.

Carbon fiber construction isn't just about weight savings—it's about thermal stability and durability in the field. Whether you're running a precision rifle at distance or a practical hunting setup, this barrel handles the demands of serious shooting. Proof Research's reputation for accuracy and quality control means you're investing in a barrel built to group consistently, shot after shot.

Key Features

• 260 Remington chambering with 1:8 twist rate
• 18-inch barrel length for balance of velocity and handling
• 5-groove rifling for consistent bullet stability
• Carbon fiber construction for lightweight, thermally stable performance
• 5/8"-24 tpi threaded muzzle for suppressors and accessories
• Drop-in design for Sig Cross platforms
• Pre-fit for quick installation without additional gunsmithing

Specifications

Frequently Asked Questions

Will this barrel fit my Sig Cross rifle?

Yes. This barrel is engineered as a drop-in pre-fit for Sig Cross platforms, designed for direct installation without additional fitting or gunsmithing.

What twist rate does it have, and what bullets will it stabilize?

The barrel features a 1:8 twist rate, which is engineered to handle a wide range of projectiles commonly loaded in the 260 Remington cartridge. For your specific bullet weight and construction, consult published stability data or your reloading manual.

Can I suppress this barrel?

Yes. The barrel comes with a 5/8"-24 tpi threaded muzzle, which is compatible with most 260 Remington suppressors and threaded accessories.

What's the advantage of carbon fiber over a traditional steel barrel?

Carbon fiber construction provides significant weight savings while maintaining rigidity and thermal stability. This makes it excellent for precision shooting and hunting applications where every ounce counts and consistent thermal behavior is critical for accuracy.