finding 6.5 Grendel BCG's

[Rkangel]

Cryptic Coatings is the online retail side of Toolcraft. Even their phosphate and nitride BCG's are excellent quality in my experience. A lot of items are on backorder though. You may have to source a bolt and carrier separately to get what you need.

Not a huge fan of Optics Planet but they have 3 Aero Precision BCGs left in stock. If you trust their inventory.
https://www.opticsplanet.com/aero-precis...group.html

Or Spicetac. Heard better things about them:

https://www.spicetac.com/aero-precision-...k-nitride/