The Rosco Mfg Bloodline 16" 5.56 NATO barrel brings purpose-built engineering to modern carbine builds. Rosco doesn't take a one-size-fits-all approach to barrel design—instead, they engineer for specific use cases, balancing dwell times, gas port sizing, and material selection to deliver reliable performance whether you're running a suppressor, building an SBR, or putting together a patrol-ready setup. This 16-inch barrel is engineered with the details that matter: proper gas dynamics for .223/5.56 performance and a nitride finish that stands up to hard use and corrosion.

Built for shooters who demand more than off-the-shelf commodity parts, the Bloodline barrel draws input from both civilian users and military end-users to solve real-world performance problems. The .750" gas block diameter gives you compatibility with standard AR platform accessories and allows you to tune your system for the specific ammo and suppressor setup you're running. Whether you're assembling a duty rifle, a precision carbine, or an SBR project, this barrel provides the foundation for a balanced, reliable firearm.

Rosco barrels are manufactured with attention to the variables that separate good barrels from great ones. Twist rate, gas port diameter, and material composition aren't afterthoughts—they're engineered for the actual way modern shooters use their rifles. The Bloodline 16" is a serious upgrade over generic surplus or budget alternatives, giving you the performance and longevity that justify a quality barrel in your build.

Key Features

• 16-inch barrel length optimized for 5.56 NATO / .223 Remington
• Engineered gas port sizing for reliable cycling across suppressed and unsuppressed configurations
• Nitride finish for corrosion resistance and durability
• .750" gas block diameter for standard AR platform compatibility
• Designed with input from both civilian and military users for real-world performance

Specifications

Caliber	5.56 NATO
Barrel Length	16 inches
Gas Block Diameter	.750"
Finish	Nitride
Manufacturer	Rosco Manufacturing

Frequently Asked Questions

Will this barrel work with my AR-15 platform?

Yes. The .750" gas block diameter is standard on AR-platform rifles and carbines. This barrel integrates with typical AR-15 upper receivers and components.

Is this barrel suitable for suppressed shooting?

The Bloodline barrel is engineered with gas port sizing to handle both suppressed and unsuppressed operation. Proper tuning with your specific suppressor and ammunition will give you the best results.

What's the difference between the Bloodline and other 5.56 barrels?

Rosco engineers each barrel specifically for its intended use—twist rate, gas port diameter, and material are selected based on the barrel's role, rather than using a generic approach across the line. The Bloodline is designed with modern carbine requirements in mind, including dwell time management for various configurations.

Does this barrel come with a gas tube or bolt carrier group?

This is a barrel only. You will need to source compatible gas tube, gas block, and upper receiver components separately to complete your build.