Aero makes great bcgs! - Aero Precision AR-15 6mm ARC, 6.5 Grendel Bolt Carrier Group (BCG)

Put this in the new 6.5 Grendel build. No complaints from me. Works great, looks good, if it holds up like other aero products then I'm not going to shoot my gun enough before it wears out. I suppose if you're someone that shoots the absolute heck out of your guns you're better off going Lantac or something much more expensive but for most people aero BCG does the trick just fine.