“Diamondback 556C16MF50B8R DB Barrel (M4 Contour) 5.56x45mm NATO 16″ Black Nitride 4150 Chrome Moly Vanadium Steel” has been added to your cart. View cart

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February 11, 2026Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi, Carbon Fiber Wrapped
$999.00
Proof Research 100639 AR-Style Barrel 6.5 Creedmoor 22″ Rifle +2 Length Gas System 1:8″ Twist 4 Grooves, 5/8-24 tpi, Carbon Fiber Wrapped
1 in stock
SKU: TSW|152031
Category: AR Barrels
Up to 64% lighter than traditional steel barrels of similar contour. Improved heat dissipation for cooler and longer lasting barrels. Wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin.
| UPC | 843068100639 |
|---|---|
| Manufacturer | Proof Research |
| Manufacturer Part Number | 100639 |
| Length | 22" |
| Model | AR-Style Barrel |
| Rate of Twist | 1:8" |





