I purchased a new bolt because I was experiencing horrible ejection/extraction problems with my new BCA 24 inch 6mm ARC upper. I tried an adjustable gas block and a six ounce buffer thinking that one of those would resolve the issue. They did not. The new Grendel Hunter bolt, however, did resolve the issue. After a quick replacement of the BCA bolt, all problems with ejection/extraction went away. The BCA upper was working flawlessly with sub moa groups at 100 yards with factory ammo. Thank you Grendel Hunter for a quality product! I am now a fan.
