Daniel Defense 18" 5.56 NATO S2W Profile Rifle Barrel – AR-15 Platform

The Daniel Defense 18" 5.56 NATO S2W (Strength to Weight) profile barrel delivers extended engagement range and enhanced velocity for precision-oriented AR-15 builds. The 18" length maximizes 5.56 NATO ballistic performance while maintaining practical maneuverability, making it ideal for designated marksman rifles, varmint hunting, and long-range target work. The S2W profile optimizes rigidity and heat dissipation without excess weight, balancing accuracy potential with sustained fire capability.

Manufactured from chrome moly vanadium steel with a government profile gas block journal, this barrel features a mid-length gas system for reliable cycling and reduced recoil impulse. The chrome-lined bore and chamber ensure long service life and simplified maintenance. M4 feed ramp extensions provide enhanced feeding reliability with modern ammunition. Installation requires standard AR-15 barrel nut tooling and proper headspacing verification with bolt carrier group. Compatible with standard AR-15 upper receivers and .750" gas blocks.

• Type: Rifle Barrel
• Caliber: 5.56 NATO / .223 Remington
• Length: 18 inches
• Profile: S2W (Strength to Weight)
• Gas System: Mid-length
• Material: Chrome Moly Vanadium Steel
• Finish: Chrome-lined bore and chamber
• Twist Rate: 1:7"
• Gas Block Journal: .750"
• Compatible Firearms: AR-15 platform rifles