Engineered for performance and durability, the Green Mountain 5.56 AR-15 Barrel delivers reliable accuracy in a compact 14.5-inch M4 A1 profile. This carbine-length gas system barrel is built to meet the demands of tactical shooters and builders seeking a mil-spec component for their AR-15 platform.
Key Features
- Chrome-lined bore and chamber for exceptional corrosion resistance and extended service life under high-volume firing
- Phosphate finish provides a durable, non-reflective exterior coating that protects against wear and environmental factors
- M4 profile balances weight and strength for optimal handling in carbine configurations
- 1:7 twist rate stabilizes a wide range of bullet weights, including heavier 62gr and 77gr projectiles
- Carbine-length gas system ensures reliable cycling with standard 5.56 NATO ammunition
Technical Specifications
- Barrel Length: 14.5 inches
- Caliber: 5.56 NATO / .223 Remington
- Twist Rate: 1:7
- Gas System: Carbine
- Gas Block Journal: 0.750 inches
- Muzzle Thread: 1/2×28
- Barrel Profile: M4
- Finish: Phosphate with chrome-lined bore and chamber
- Platform: AR-15
- Weight: 29.6 ounces
Why Choose This Barrel
This Green Mountain barrel addresses common builder concerns by combining proven mil-spec construction with features that enhance accuracy and longevity. The chrome lining reduces fouling and simplifies maintenance, while the phosphate exterior resists rust without adding unnecessary bulk. Its M4 contour provides a classic balance suited for modern carbine builds, and the 1:7 twist supports versatile ammunition choices for training or defensive applications.
Whether you’re assembling a new upper or replacing a worn barrel, this component integrates seamlessly with standard AR-15 components for consistent function and precision.
