Harrington & Richardson Early 604 "Air Force" Complete Upper Receiver, 1/12 Twist, Gray.

These early Air Force 604 style uppers utilize a few transition parts including a "Non-Serrated" Chrome, Full Auto, Bolt Carrier Group, and the iconic 3 prong flash hider. The upper receiver is Gray Type 3 Hard Coat Anodized. These complete uppers are hand fitted and assembled right here in the United States of America.