Diamondback DB Barrel 5.56x45mm NATO 16" M4 Contour 1:8 Twist Black Nitride

The Diamondback DB Barrel is an OEM replacement barrel chambered in 5.56x45mm NATO and built for the AR-15 platform. It features a 16" carbine-length medium (M4) contour profile, a 1:8" twist rate that stabilizes a broad range of bullet weights, and a durable black nitride finish.

Constructed from 4150 Chrome Moly Vanadium steel, this barrel is engineered for long service life and reliable heat cycling. The nitride finish provides enhanced corrosion resistance and surface hardness for hard use in the field or on the range. The 1:8" twist is well matched to common 5.56 NATO and .223 Remington projectile weights, making this barrel a versatile choice for general-purpose, target, and defensive AR-15 builds.

Designed as a direct OEM replacement for Diamondback AR-pattern rifles and a fitting upgrade option for custom AR-15 builds, the DB Barrel delivers factory-spec performance in the familiar M4 contour profile.