5 Best BCGs: Best Bolt Carrier Groups – Full Review & Buyers guide

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With each shot, the bolt carrier group or BCG is the part that moves back and forth. It’s the primary functioning component of your semi-automatic rifle, and proper selection can mean the difference in critical situations. But which are the best BCGs?

Since it’s the most complex and essential part of your rifle’s firing mechanism, you want the right BCG. The bolt and carrier group bears the brunt of gas pressure as it acts as your AR-15s action, housed between the lower and upper receiver. When looking at the best BCGs, factors to consider will include weight, hole size for the firing pin, coatings, bolt choice, and plating.

To help you put together a rifle you can rely on, and I will talk about the essential characteristics of the best BCG. As you read on, you’ll discover what is available