M118lr Sbn Barrel .308 Win 18 1-10 Mid-length Black

The Criterion Barrels Inc M118lr Sbn Barrel .308 Win 18" 1-10 Mid-length Black is a precision-engineered rifle barrel built for law enforcement designated marksman rifles, tactical carbines, and long-range hunting platforms. This 18-inch barrel delivers the velocity and accuracy demanded by professional shooters and serious sport competitors who require sub-minute-of-angle performance at extended distances. The M118LR nomenclature directly references the military M118 Long Range cartridge standard, signaling this barrel's lineage in combat-proven ballistics and accuracy requirements.

Criterion's mid-length profile balances rigidity and thermal stability—critical factors in consistent shot placement during rapid-fire sequences. The 1-in-10 twist rate is optimized for .308 Winchester, stabilizing match-grade bullets from 168 to 190 grains across standard and magnum loading pressures. At 2.6 pounds, the barrel weight provides sufficient mass for heat dissipation and harmonic consistency while remaining manageable for tactical configurations where operator control is paramount. The black nitride or phosphate finish resists corrosion and wear, essential in field environments where moisture and abrasive conditions are constant threats.

This barrel integrates seamlessly into AR-10 pattern builds, M110 SASS variants, and other .308 platforms utilizing standard AR-10 chamber specifications. Shooters operating in 300-yard to 1,000-yard engagements benefit from the 18-inch length, which sustains muzzle velocity above 2,550 feet per second while maintaining the portability required for vehicle-mounted and room-clearing operations. Installation requires precision gunsmithing to ensure proper headspacing and barrel extension alignment. Criterion's reputation for quality control and strict dimensional tolerances means this barrel ships ready for a competent armorer to install without secondary finishing or hand-fitting.