They have worked closely with their partners at Mega Arms to bring this lower to the market.
- 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 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