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Taking the AR15 parts and accessories to new heightsTM
Grey Ghost Precision

Grey Ghost Precision Cornerstone AR-15 Forged Stripped Lower

Grey Ghost Precision Cornerstone AR-15 Forged Stripped Lower
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Availability: Out of stock




Cornerstone; “ the chief foundation on which Something is constructed or developed” When you want to start your AR build, the lower is the starting point. We have worked closely with our partners at Mega Arms to bring this lower to the market. The fit and finish of our cornerstone will prove to you that you have the right beginning to a reliable and strong AR build. When coupled with our Grey Ghost Precision uppers, the match is very hard to beat.



  • Machined to tighter than Mil-Spec tolerance, the critical tooling dimensions are held to within + - .001
  • Machined from forged 7075-T6 Aluminum
  • Black Hard anodized with a surface hardness of 60 Rockwell
  • Features a nylon tipped tensioning screw to ensure the solid fit between upper and lower maintains for years to come.
  • Functions with nearly all available AR parts kits and uppers.
  • Flared mag well
  • Pictogram safe and fire indicators
  • Chevrons on the front of the mag well and the distinctive Grey Ghost markings tie the Cornerstone to the Specter Series of Rifles from Grey Ghost Precision.
  • Weight 8oz


Additional Info

Additional Info

Manufacturer Grey Ghost Precision
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No


Customer Reviews (3)

A great basis for any buildReview by Kyle
A beautiful and sturdy lower that is just as described and well made. I'll be ordering another when they come back in stock! (Posted on 8/19/2016)
No commentReview by Abel
Great product. Rainer Arms carries exceptional products. And your customer service is great. Thank you very much. (Posted on 8/16/2016)
New buildReview by Pistol Peet
Starting new build and wanted to give GGP a try. Very happy with quality. If you are undecided, DO IT, you won't be disappointed. (Posted on 5/10/2016)

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