AR-15 5.56 NATO/.223 Rem 18" Red Diamond Fluted Stainless Steel Heavy Barrel – 1:8 Twist

Barrel Specs

The AR-15 5.56 NATO/.223 Rem 18" Red Diamond Fluted Stainless Steel Heavy Barrel combines precision barrel construction with a distinctive red Cerakote finish and exposed stainless steel diamond fluting.

Manufactured from 416R stainless steel, this 18-inch heavy-contour barrel is hardened to 26–32 HRC and stress-relieved for dimensional stability. Its 1:8 twist rate accommodates a broad range of commonly available 5.56 NATO and .223 Remington ammunition.

The barrel features a mid-length gas system, .750-inch gas block journal, and standard 1/2x28 muzzle threads for compatible muzzle devices.

Its diamond-fluted exterior removes material from the heavy barrel contour while increasing exposed surface area. The red Cerakote finish contrasts with the exposed stainless steel fluting, creating a distinctive two-tone appearance.

Chambered in 5.56 NATO, the barrel accepts both 5.56 NATO and .223 Remington ammunition.

The barrel includes an installed barrel extension with M4 feed ramps, barrel extension pin, and a pre-drilled gas port.

Production ETA: 3–4 weeks.

Key Features

• 18" heavy-contour AR-15 barrel

• Chambered in 5.56 NATO; accepts .223 Remington

• 416R stainless steel construction

• Hardened to 26–32 HRC

• Stress-relieved barrel

• 1:8 twist rate

• Red Cerakote finish

• Exposed stainless steel diamond fluting

• Mid-length gas system

• .750" gas block journal

• 1/2x28 muzzle threads

• Installed barrel extension and pin

• M4 feed ramps

• Pre-drilled gas port

• Production ETA: 3–4 weeks

Specifications

Package Includes

• One 18" 416R stainless steel heavy-contour barrel

• Red Cerakote finish with exposed stainless steel diamond fluting

• Installed barrel extension with M4 feed ramps

• Installed barrel extension pin

• Pre-drilled gas port

Gas block, gas tube, muzzle device, upper receiver, and other assembly components are not included.

FAQ

Is this barrel chambered for both 5.56 NATO and .223 Remington?

Yes. The barrel is chambered in 5.56 NATO and accepts both 5.56 NATO and .223 Remington ammunition.

What is the barrel's twist rate?

The barrel features a 1:8 twist rate.

Is the entire barrel coated red?

The barrel features a red Cerakote finish with exposed stainless steel diamond fluting for a contrasting appearance.

What gas system does this barrel use?

A mid-length gas system with a .750-inch gas block journal.

Does the barrel include a gas block or muzzle device?

No. The barrel includes the installed barrel extension and pin, M4 feed ramps, and pre-drilled gas port. Other assembly components are not included.

What is the production lead time?

The estimated production time is 3–4 weeks.

Product Image Notice

Images may not be the exact representation of the product.