Ggp Forged Lower Rcvr Cornerstone

The Grey Ghost Precision Forged Lower Receiver Cornerstone (GGPC) is a precision-machined AR platform lower receiver designed to serve as the foundation for a reliable, mil-spec-exceeding rifle build. Machined to tighter tolerances than standard military specification—with critical dimensions held to within ±0.001 inch—this forged lower receiver provides the dimensional accuracy and mechanical integrity that serious builders demand when constructing duty-grade or competitive rifles.

Manufactured from 7075-T6 aluminum, the Cornerstone features a hard-anodized finish rated at 60 Rockwell surface hardness, ensuring corrosion resistance and durability across extended operational timelines and varied environmental conditions. The flared magazine well design improves speed during tactical magazine changes and reduces the risk of fumbled reloads under pressure—a practical refinement that separates precision builds from standard variants. The black hard-anodize finish provides a durable, non-reflective surface suitable for duty use or training environments.

The Cornerstone lower is engineered for law enforcement, military personnel, and serious civilian builders who prioritize accuracy, longevity, and repeatable performance. Whether building a precision rifle for duty carry, range validation, or competitive shooting, this forged lower receiver accepts standard AR components and integrates seamlessly with mil-spec upper receivers. The dimensional consistency ensures reliable function across thousands of rounds while maintaining the tight tolerances required for sub-MOA performance.

For builders seeking a forged lower receiver with engineering precision beyond baseline mil-spec, the Grey Ghost Precision Cornerstone delivers the foundation needed for a rifle build that performs consistently in field conditions and meets exacting standards for accuracy and reliability.