Product Overview

The Rosco Manufacturing Bloodline 11.5" barrel (Part Number: NGB-001 SP-BL-115-556-BCG-GTC, UPC 181969500722) is a premium, government‑profile barrel engineered for the modern AR‑15 platform. Finished in a rugged Melonite coating, this barrel delivers exceptional corrosion resistance, reduced friction, and a longer service life. It comes as a complete package that includes a high‑quality gas block, precision‑cut gas tube, and a fully‑matched bolt carrier group (BCG), allowing you to upgrade or build your rifle with confidence.

Key Features & Benefits

• 11.5‑inch Government Profile – Optimized for maneuverability while maintaining excellent ballistic performance.
• 5.56 NATO Chamber – Fully compatible with all standard 5.56×45 mm ammunition, including NATO‑spec rounds.
• Melonite Finish – Provides a hard, black oxide surface that resists wear, rust, and fouling, extending barrel life.
• Integrated Gas Block – Direct‑threaded, low‑profile design for reliable gas flow and minimal weight.
• Precision‑Machined Gas Tube – Ensures consistent pressure delivery to the BCG for smooth cycling.
• Full‑Match Bolt Carrier Group (BCG) – Balanced for reduced recoil and enhanced reliability.
• Cold Hammer‑Forged Construction – Delivers superior strength and a tighter bore for improved accuracy.
• Threaded Muzzle (5/8‑24) – Ready for a suppressor, flash hider, or muzzle brake.
• Lightweight Design – Perfect for close‑quarters, competition, or tactical applications.

Technical Specifications

Why Choose the Rosco Bloodline Barrel?

When reliability and performance matter most, the Rosco Bloodline barrel stands out. Its Melonite coating dramatically reduces barrel fouling, allowing for longer shooting sessions without cleaning. The government profile provides a perfect balance between compact size and accuracy, making it ideal for tactical operators, competition shooters, and enthusiasts seeking a versatile platform.

The included gas block, gas tube, and matched BCG are engineered to work together seamlessly. This integrated system guarantees consistent cycling, reduced recoil impulse, and a smoother shooting experience—whether you are using standard ball ammo or high‑velocity rounds.

Installation & Compatibility

The Rosco Bloodline barrel is designed for direct‑threaded installation into standard AR‑15 uppers. It pairs flawlessly with most commercial handguards, rail systems, and muzzle devices. The package includes everything needed for a quick, tool‑minimal build:

1. Thread the barrel into the upper receiver.
2. Install the gas block onto the barrel using the supplied set screws.
3. Insert the gas tube and secure it to the gas block.
4. Fit the matched BCG into the upper and test the function.
5. Attach your preferred muzzle device to the 5/8‑24 thread.

No additional components are required, making this an all‑in‑one solution for builders who demand precision and reliability.

Ideal Applications

• Home defense and tactical rifles
• Competitive 3‑gun shooting
• Precision shooting at 100–300 meters
• Law enforcement and military training platforms
• Custom AR‑15 builds seeking a high‑quality barrel and gas system