Hello.
Are all AR15 bolt carriers the same and not caliber specific?
Natalee Answered question July 5, 2022
Yes, bolt carrier groups are definitely caliber specific. The type of cartridge that a given bolt carrier group is designed for will determine the size and shape of the bolt carrier group. For example, an AR-15 bolt carrier group will not be compatible with an AR-10 rifle. Likewise, a .223/5.56mm bolt carrier group will not be compatible with a 7.62x51mm/.308 Winchester firearm. If you try to use the wrong type of bolt carrier group in a given firearm, serious damage could occur to both the gun and the ammo itself, so it’s important to make sure you’re using the correct BCG for your specific needs.
Mike Answered question July 5, 2022