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This product may be classified as a firearm and/or firearm accessory and is not legal for sale, possession, or use in all states or local jurisdictions.
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Detailed Description
These OEM AR-15 5.56mm barrels deliver dependable performance, durability, and precision for builders who demand proven materials and consistent manufacturing standards. Produced to meet OEM contract specifications, each barrel is constructed from 4150 CrMoV steel a mil-spec grade alloy known for its strength, heat resistance, and long service life under demanding conditions. With a 1:7 twist rate, these barrels are optimized to stabilize a broad range of 5.56/.223 projectile weights, making them versatile for training, competition, or general-purpose shooting applications.
Offered in both HBAR (Heavy Barrel) and standard profiles, these options allow builders to tailor their rifle’s balance and handling characteristics. The HBAR configuration provides added rigidity and improved heat absorption during sustained firing, while the standard profile reduces front-end weight for improved maneuverability. Select 14" models are also available with a mid-length gas system, designed to promote smoother cycling impulse and enhanced reliability when properly configured.
Key Advantages of the OEM AR-15 5.56mm Barrels
- Chambered in 5.56 NATO
- 1:7 twist rate for broad projectile stabilization
- Manufactured from durable 4150 CrMoV steel
- Available in HBAR and standard profiles
- Length options: 10.5", 11.5", 14", and 14" mid-length gas system
- Mid-length gas option available in select 14" configuration
- Built to OEM production standards
- Ideal for AR-15 platform builds and upgrades
Technical Specifications
Caliber // 5.56 NATO
Twist Rate // 1:7
Material // 4150 CrMoV Steel
Barrel Profiles // HBAR (Heavy Barrel), Standard
Barrel Lengths // 10.5 in, 11.5 in, 14 in, 14 in (Mid-Length Gas System)
Gas System Options // Carbine Length (10.5", 11.5", 14"), Mid-Length (Select 14")
Platform Compatibility // AR-15
Manufacturing Origin // OEM Contract Overrun
Compatibility
Compatible with AR-15 body rifle