A: I'm not sure, we are only aware of the problems with the 7.62x39 but if they machine their 6.5 Grendels with the wrong extractor pocket that doesn't allow the extractor to sit properly flush like they do their 7.62x39 bolt assemblies it can be an issue. We just haven't heard of any issues, as of yet, with the 6.5 Grendel bolts.
Answer provided by: Black Rifle Arms Sales Team (3/14/2021)