Harrington & Richardson Early 604 “Air Force” Complete Upper Receiver, 1/12 Twist, Gray.
| SKU: 16551639490 |
| BRAND: Harrington & Richardson |
Product Details
Caliber: 5.56 NATO
Barrel Length: 20″
Barrel Profile: Pencil
Barrel Steel: 4150 Chrome Moly Vanadium
Barrel Finish: Parkerized
Chrome Lining: Yes
Muzzle Thread Pattern: 1/2″ x 28
Twist Rate: 1/12
Barrel Extension: Rifle
Gas System Length: Rifle
Diameter at Gas Block: .625″
Gas Block Type: Rifle Height Front Sight Base
Muzzle Device: 3 Prong
Receiver Material: Forged 7075-T6
Upper Receiver Type: Slick Side M16 w/o feed ramps
Handguard Type: M16A1 Triangular, with heat shields
Bolt Material: Carpenter 158 Steel, Chrome
Bolt Carrier Profile: Full Auto, No Serrations, Chrome
Overall Length: 30 inches
Weight (as configured): 4 lbs
Features
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.
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