Grey Ghost Precision Cornerstone Stripped Lower, .223 Rem/5.56 NATO

Description

The Grey Ghost Precision Cornerstone forged lower receiver is a robust starting point for a reliable AR platform. This stripped lower is machined to tighter than Mil-Spec tolerance, with critical tooling dimensions held within +/ – .001″ to ensure consistent fit and alignment. Finished in matte black, it is specified for use in builds chambered in .223 REM/5.56 NATO.

Key Specifications

• The model is Cornerstone.
• This item is a Stripped Lower Receiver.
• The finish is Matte.
• The color is Black.
• Chambering is listed as .223 REM/5.56 NATO.
• The action is specified as Semi-Auto.
• The subcategory is Lower Receivers.
• Manufactured by Grey Ghost Precision.
• Critical tooling tolerances are held to within +/ – .001″.

Built for builders who value precise fit and durable construction, the Cornerstone provides a dependable foundation for custom AR projects. Its forged construction and tight tolerances reduce fitment work and help streamline assembly, making it a practical choice for serious shooters.