What I ment was the channel in the upper recever that the bolt carrier slides back and forth in. After re-reading my post I relize I made it sound like the bolt bore in the carrier :roll: Thanks for responding, Colorado Osprey.
What I ment was the channel in the upper recever that the bolt carrier slides back and forth in. After re-reading my post I relize I made it sound like the bolt bore in the carrier :roll: Thanks for responding, Colorado Osprey.