Young Manufacturing's signature product, the National Match Bolt Carrier Group, complete. This bolt carrier is 1/2 oz heavier and has more surface area at the carrier front. These additions provide improved alignment of the bolt carrier as it moves in the receiver, tighter tolerances, more consistent bolt-lockup, and generally much smoother operation. This bolt carrier causes less wear, improved accuracy, and overall better function. All Y/M carriers are made using these high standards. The extra precision, quality, and post production processes are among the reasons Les Baer Custom and other top custom companies choose Young Manufacturing, Inc bolt carriers. You should too!