Upgrade your AR-15 build with the Green Mountain 18″ .223 Wylde M4 profile barrel, precision-machined from 416 stainless steel for exceptional accuracy and long-term durability. This fluted barrel combines a versatile .223 Wylde chamber with a 1:8 twist rate to deliver reliable performance across a wide range of ammunition, making it an ideal choice for tactical applications, competition shooting, and range use.
Key Features
- 416 Stainless Steel Construction – Provides superior corrosion resistance and heat dissipation while maintaining structural integrity under demanding conditions.
- Fluted M4 Profile – Reduces overall weight without sacrificing rigidity, improving handling and balance on your AR-15 platform.
- .223 Wylde Chamber – Optimized for both .223 Remington and 5.56 NATO ammunition, offering enhanced accuracy and compatibility.
- Rifle-Length Gas System – Ensures smooth, reliable cycling with a 0.75″ gas block journal for easy installation of standard gas blocks.
- Button-Rifled, Air-Gauged, and Stress-Relieved – Manufactured to exacting tolerances for consistent shot-to-shot performance.
- Black Passivated Bead-Blast Finish – Delivers a non-reflective matte appearance while adding an extra layer of protection against the elements.
Specifications
- Barrel Length: 18 inches
- Twist Rate: 1:8
- Muzzle Thread: 1/2×28
- Gas System: Rifle length
- Gas Block Journal: 0.750 inches
- Platform: AR-15
- Finish: Stainless with black passivation
- Weight: 32 oz
Why Choose This Barrel
This Green Mountain barrel addresses common shooter needs by balancing lightweight design with robust performance. The fluting helps manage heat during sustained fire, while the stainless construction resists rust and wear far better than standard carbon steel options. Whether you’re building a precision AR-15 or upgrading an existing setup, this barrel supports accurate follow-up shots and dependable function in varied environments.
Choose the Green Mountain .223 Wylde 18″ fluted barrel to enhance your firearm’s accuracy, reliability, and overall shooting experience.


