Grey Ghost Precision Conerstone AR-15 Lower Receiver

Manufactured by Grey Ghost Precision


Out of Stock

NOTE: Limit 1 per household. Quantities exceeding 1 will not allow checkout.


Out of Stock

Items that are regulated by the ATF have restrictions and requirements:
•Your entire order will ship only to a Federal Firearm License holder.
•Current processing time is approximately 14 to 16 days.
•NJ, NY and CA are not able to accept transfers at this time.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers. Due to Covid-19 many are no longer open
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to


The lower receiver is the cornerstone of any AR build. A lack luster lower can vary widely in final specs and negatively impact your build's reliability. Start your AR-15 build off with a solid foundation using Grey Ghost Precision's Cornerstone stripped lower!

  • Precision machined to within +/- 0.001" tolerances
  • Cut from high strength 7075-T6 aluminum forgings
  • Hardcoat anodized black finish with 60 Rockwell surface hardness
  • Flared magazine well for faster reloads
  • Pictographic Fire and Safe indicators
  • Nylon-tipped receiver tension screw

A proper MIL-SPEC lower receiver's dimensions can vary over .005" or more from one receiver to the next. This is fine for a military rifle, but these tolerance errors can stack up, impacting parts compatibility, fit, and function, especially when using aftermarket components. By comparison, the Cornerstone lower receiver is machined  to exceptionally tight +/- 0.001" tolerances, allowing for incredible consistency. To further increase accuracy, this lower features a nylon tipped tension screw, ensuring your upper and lower fit together without rattle.

With an extensive military and manufacturing background, and an impressive network of industry and shooting experts, Grey Ghost Precision has pushed on to create not just exceptional firearms and accessories, but make sure those products are accessible to shooters everywhere. They also fully stand behind their products, with a limited lifetime guarantee!


BrandGrey Ghost Precision
Caliber MarkingMulti-Caliber
FinishHardcoat Anodized
Receiver Material7075-T6 Aluminum
Trigger Pin DiameterMIL-SPEC .154

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

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