Rosco Bloodline 16" 5.56 NATO M4 Barrel

Rosco Bloodline 16" 5.56 NATO Barrel

The Rosco Bloodline barrel represents a thoughtful approach to modern rifle design, built around proven United States Army Special Operations Command specifications with Rosco's own refinements.

Key Features

• Barrel Length & Caliber: 16" in 5.56 NATO
• Profile: M4 profile for balanced handling and heat management
• Gas System: Mid-length configuration for optimized dwell time and smoother gas curve
• Twist Rate: 1:7 for excellent velocity and bullet stability across a wide range of ammunition weights
• Material & Finish: 4150 CMV steel with durable nitride coating
• Threading: 1/2x28 thread pitch for standard muzzle devices
• Compatibility: Direct fit for AR15 upper receivers

Performance Philosophy

The mid-length gas system is the key to this barrel's character. By allowing gas to expand more fully before cycling the bolt carrier, you get a smoother, more controlled impulse. This translates to reduced felt recoil, faster target reacquisition, and more reliable function across varying ammunition types and suppressor configurations.

The 1:7 twist rate handles everything from lightweight varmint rounds to heavier match-grade ammunition, making this a versatile choice for shooters who refuse to compromise on flexibility.

Whether you're building a duty rifle, a precision platform, or a general-purpose AR, the Bloodline barrel delivers the balance of speed and control that serious shooters demand.