The 6.5 Grendel is a flat shooting round with little recoil, so many shooters are switching to this caliber in their ARs. However, to change to this caliber, you need to change the upper, including the bolt carrier group (BCG).
What are the best 6.5 BCGs? I’m glad you asked because we compiled this list to help you choose the one that best fits your situation. This article is part of our ongoing Guide to Everything AR.