When building your next rifle, make sure you have the best parts available for your application. When that time comes, take a look at the Angstadt Arms Ar-15 Bolt Carrier Group for the 9mm Luger. This bolt carrier is compatible for GLOCK and Colt style 9mm AR-15 magazines without any further modifications.
Features and Specifications:
For use with a standard AR-15 hammer
Machined from 8620 alloy steel
QPQ nitride finish
Fits: both GLOCK and Colt 9mm AR-15 magazines