Sons of Liberty Gun Works Precision 6mm ARC SPR Mid-Length - AR-15 Barrel - 16"

Accuracy is the entire point. The Sons of Liberty Gun Works Precision 6mm ARC SPR barrel is SOLGW's most accurate barrel offering — 416R stainless steel, black oxide coated, polygonally rifled with a 3-groove bore — built in the SPR contour that prioritizes rigidity and consistency over weight savings, and threaded 5/8x24 for suppressor compatibility.

The Sons of Liberty Gun Works Precision 6mm ARC SPR Barrel is a 16-inch accuracy-optimized AR-15 barrel chambered in 6mm ARC, machined from 416R stainless steel with a 3-groove polygonal rifling profile and black oxide coating on a mid-length gas system.

Four specifications define this barrel's position as SOLGW's premier accuracy offering. 416R stainless steel provides the material properties that precision barrel makers have relied on for decades — superior corrosion resistance, tight grain structure, and inherent accuracy potential that chrome moly steel cannot match at the same consistency. Three-groove polygonal rifling reduces friction, minimizes fouling accumulation, and delivers consistent bullet engagement across a wide range of 6mm ARC projectile weights, supporting the sub-MOA performance that the 6mm ARC cartridge is capable of. The SPR contour prioritizes barrel rigidity over weight, reducing harmonic variability during firing and maintaining point of impact consistency across temperature extremes and extended strings. Black oxide coating protects the stainless exterior without adding dimensional variation that could affect headspace or receiver fit.

Compatible with mil-spec AR-15 lowers configured for 6mm ARC. Mid-length gas system. .750-inch gas block journal. 5/8x24 threaded muzzle.

416R stainless steel. Black oxide finish. 1:7 twist. SPR profile. 3-groove polygonal rifling.

Purpose-built for 6mm ARC precision rifle builds, designated marksman configurations, suppressed precision AR-15 platforms, and any application where barrel accuracy is the primary design criterion.

By Sons of Liberty Gun Works. Standard SOLGW warranty applies.