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RSR Part #: GGPGGPC Manufacturer Part #: GGPC

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Grey Ghost Precision, Cornerstone Forged Stripped Lower, 223 Rem/556NATO, Black Finish


WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

  • Black Hard anodized with a surface hardness of 60 Rockwell
  • 7075-T6 Aluminum
  • Flared mag well

Product Description

The fit and finish of the Cornerstone will provide the right start to a reliable and strong AR build. Machined to tighter than Mil-Spec tolerance, the critical tooling dimensions are held to within +/ - .001".