M118lr Sbn Barrel .308 Win 20 1-11 Rifle-length Black

The M118LR SBN Barrel .308 Win 20 1-11 Rifle-length Black from Criterion Barrels Inc represents a precision-engineered solution for AR .308 platform builds demanding both accuracy and practical handling. Designed to support the M118LR cartridge—the military's long-range designated marksman round—this 20-inch barrel bridges the gap between intermediate and full-length configurations, making it ideal for tactical marksmen, long-range competition shooters, and law enforcement precision teams who require reliable, sub-MOA performance without excessive overall length or weight penalties.

Built with Criterion's proven cold-hammer-forged steel construction, this barrel features a 1-in-11-inch twist rate optimized for heavier .308 Winchester projectiles (typically 168–180 grain), ensuring stable flight and consistent ballistic performance at extended distances. The hybrid contour profile delivers a measured balance: sufficient mass forward of the receiver to manage recoil impulse and thermal stability during rapid strings, yet remains light enough at 2.89 pounds to keep overall rifle weight manageable. The rifle-length gas system ensures reliable operation with standard .308 AR platforms, while 5/8-24 muzzle threading accommodates most modern suppressors and muzzle devices—critical for sound reduction and recoil mitigation in tactical environments.

This barrel excels in precision rifle builds where accuracy, durability, and practical ergonomics converge. Installation requires standard AR .308 gunsmithing tools and headspace verification; no specialized equipment or proprietary components are necessary. The black finish resists corrosion and maintains a low-profile aesthetic. Shooters building designated marksman rifles, semi-automatic precision platforms, or modernized rifle configurations will find this barrel delivers the accuracy and reliability demanded by professional standards—whether on the range, in competition, or in operational readiness.