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Upgraded AR-15 bolt carrier groups can offer improved performance over factory components, reducing malfunctions and enhancing your rifle's shootability. The Classic Firearms team has compiled our list of the top 5 replacement BCGs we recommend in 2023.
To be considered for our list, each bolt carrier group must be made of high quality steel and have a nickel boron finish for supreme durability and functionality. Smooth, precise operation guarantees better cycling and fewer feed-related malfunctions so that you can always depend on your rifle to run the way you need it to during a defensive encounter.
Aero Precision has earned a reputation for offering top-notch AR-15 parts and receivers at a reasonable price point. This model is made of C158 Carpenter steel and features a satin nickel boron finish, both of which enhance performance and deliver a superb shooting experience.
Rated for full-auto fire, the LBE Unlimited complete bolt carrier group is a solid upgrade that allows for rapid follow-up shots while mitigating risk of failures to extract. It is constructed from 8620 steel with a durable nickel boron coating.
Each Ballistic Advantage bolt carrier group is built to last and is test fired to ensure proper functionality before it ever leaves the factory. Installing this model in your AR-15 will improve reliability over the lifespan of your rifle.
Precision machined from C158 Carpenter Steel, this Wilson Combat bolt carrier group was specifically engineered for heavy long-term use without wearing down or affecting performance. It is a high-performance upgrade that can make any rifle shoot like a custom gun.
The Low Mass Bolt Carrier Group from Rise Armament combines a lightweight build with unparalleled power and durability. By reducing the overall weight of the BCG (~8.9 ounces), this model reduces recoil - empowering the shooter to make faster, more accurate shots.
For our list, we selected from BCGs with nickel boron finishes and quality steel construction because we believe this combination often yields the best results. There are still many excellent options available in black nitride and phosphorous finishes, depending on your preference. To learn more about bolt carrier groups, watch our deep dive with Clint on the topic.
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