Upgrade your AR-15 build with the precision-engineered Green Mountain .223 Wylde AR-15 Barrel. This 18-inch M4-profile barrel delivers exceptional accuracy and reliability for tactical, competition, and recreational shooting applications, combining proven manufacturing quality with modern chambering for optimal performance across a wide range of ammunition.
Key Features and Benefits
- .223 Wylde Chamber: Optimizes accuracy with both .223 Remington and 5.56 NATO loads, providing versatile compatibility without sacrificing precision or safety.
- 416 Stainless Steel Construction: Offers superior corrosion resistance and long-term durability in demanding environments, ensuring consistent performance over thousands of rounds.
- M4 Profile Design: Balances weight and rigidity for enhanced handling and reduced fatigue during extended use while maintaining structural integrity.
- 1:8 Twist Rate: Stabilizes a broad spectrum of bullet weights, from lightweight varmint loads to heavier match ammunition, promoting tight groupings downrange.
- Rifle-Length Gas System: Promotes smooth cycling and reduced recoil for improved shooter control and faster follow-up shots.
- Passivated Finish: Enhances the stainless steel’s natural resistance to rust and wear, maintaining a professional appearance with minimal maintenance.
Technical Specifications
- Barrel Length: 18 inches
- Barrel Profile: M4
- Material: 416 Stainless Steel
- Finish: Passivated
- Gas System: Rifle length with 0.75-inch gas block journal
- Twist Rate: 1:8
- Muzzle Threading: 1/2×28 for broad suppressor and muzzle device compatibility
- Platform: AR-15
- Weight: 35.2 ounces
Why Choose This Green Mountain Barrel?
Green Mountain Rifle Barrel Company has built a reputation for crafting high-quality, American-made barrels since 1976. This model addresses common shooter concerns such as inconsistent accuracy, corrosion in harsh conditions, and limited ammo compatibility. The combination of a .223 Wylde chamber, precision rifling, and robust stainless construction provides reliable, sub-MOA potential in a ready-to-install package. Whether assembling a new upper or upgrading an existing rifle, this barrel offers the performance and value serious enthusiasts demand.
Installation and Compatibility Notes
Designed for standard AR-15 upper receivers, this barrel requires proper headspacing and gas system alignment during installation. It pairs seamlessly with a wide range of aftermarket components for customized builds.


