Green Mountain 5.56 AR-15 Barrel 14.7" M4 A1 Phosphate - GM-M61

Upgrade your AR-15 build with the Green Mountain 5.56 AR-15 Barrel 14.7″ M4 A1 Phosphate. Engineered for precision and reliability, this barrel delivers consistent accuracy and long-term durability in demanding tactical and recreational shooting scenarios.

Key Features

• Chrome-lined bore and chamber for superior resistance to heat, corrosion, and wear, extending barrel life while maintaining smooth feeding and extraction.
• Phosphate finish provides robust protection against environmental elements and reduces glare for tactical applications.
• M4 profile with carbine-length gas system balances weight and strength for improved maneuverability without sacrificing performance.
• 1:7 twist rate stabilizes a wide range of 5.56 NATO and .223 Remington bullet weights for optimal accuracy across various loads.
• 0.75″ gas block journal and 1/2×28 muzzle threads ensure compatibility with standard gas blocks, muzzle devices, and suppressors.

Technical Specifications

• Barrel Length: 14.7 inches
• Caliber: 5.56 NATO
• Twist Rate: 1:7
• Gas System: Carbine
• Gas Block Journal: 0.75 inches
• Finish: Phosphate with chrome-lined bore and chamber
• Platform: AR-15
• Weight: 30.1 oz

Why Choose This Barrel

This Green Mountain barrel addresses common shooter needs for a lightweight yet durable option that supports reliable cycling and pinpoint accuracy. The chrome lining protects against the rigors of high-volume fire, while the M4-style design promotes consistent feeding. Ideal for custom builds seeking a balance of performance and value in the tactical firearms accessory market.

FAQs

• What gas system length is required? This barrel uses a carbine-length gas system for reliable operation with standard AR-15 components.
• Is the barrel chrome lined? Yes, both the bore and chamber feature chrome lining for enhanced durability and corrosion resistance.
• What bullet weights does the 1:7 twist stabilize? The 1:7 twist rate effectively stabilizes 55-77 grain projectiles commonly used in 5.56 NATO ammunition.