When I had an NEA x39 upper the firing pin length was the issue.
It was rectified when I was supplied a new bolt and firing pin. The new bolt had a few though taken off the bolt face.
Type: Posts; User: 300_BLK
When I had an NEA x39 upper the firing pin length was the issue.
It was rectified when I was supplied a new bolt and firing pin. The new bolt had a few though taken off the bolt face.