The Daniel Defense DD BBL 556 18" S2W Rifle Barrel is a purpose-built 18-inch 5.56 barrel designed to deliver dependable accuracy and long service life. Featuring Daniel Defense’s S2W (Strength-to-Weight) heavy barrel profile and a rifle-length gas system, it offers smooth cycling and consistent performance for demanding shooters building or upgrading an AR-platform rifle.

This barrel is ideal for precision-focused range work, training, and general-purpose rifle builds where reliability and consistency matter. The 18-inch length balances velocity and handling, while the threaded muzzle makes it ready for your preferred muzzle device or suppressor. Whether you are assembling a new upper or refreshing a trusted rifle, this barrel reflects Daniel Defense’s reputation for meticulous machining and durable, hard-use components.

Key Features:

• Manufacturer: Daniel Defense
• Model: DD BBL 556 18" S2W Rifle
• Caliber: 5.56
• Barrel Length: 18"
• Gas System: Rifle-Length
• Barrel Profile: S2W Heavy
• Threaded Barrel: Yes