A bolt carrier group is the part of an AR-15 that holds the firing pin and helps to cycle the ammunition. It's also responsible for feeding the rounds into the rifle. There are a number of different types of bolt carrier groups available, but the best ones for AR-15s depend on your specific needs.
There are two main types of bolt carrier groups: full-auto and semi-automatic. A full-auto bolt carrier group is best suited for rifles that will be used in automatic mode only. This type of group has a slide that moves back and forth as rounds are fired, which cycles the ammunition and makes it possible to fire continuously. You can buy the best bolt carrier group for 5.56 from https:/
A semi-automatic bolt carrier group is best suited for rifles that will be used in both automatic and semiautomatic modes. This type of group has a slide that stays in one place, which means it can only be fired in semiautomatic mode. The type of bolt carrier group you choose depends on your specific needs. If you plan to use your rifle primarily in automatic mode, a full-auto bolt carrier group is the best option
There are a few features that are common to the best bolt carrier groups. These include:
The ability to handle heavy loads.
The ability to fire rounds quickly.
These features make bolt carrier groups the perfect choice for use with AR-15 rifles. They are able to handle the heavy recoil of the rifle and fire rounds quickly, which is important for accuracy. Additionally, they are highly reliable, which is important for shooting in a high-pressure environment.