Out of stock
Diamondback 556C16H50B8NYR 16" 5.56x45mm NATO Carbine-Length OEM Replacement Barrel (No Threads) - 4150 Chrome Moly Vanadium Steel
$102.50
- Caliber-Gauge:
- 223 Remington / 5.56 NATO
- Finish-Color:
- Black Nitride
- Barrel Length:
- 16"
- Barrel Length Range:
- 16" to 16.99"
- Model:
- DB Barrel
- Twist:
- 1:8"
- Barrel Type:
- Carbine Length Heavy Profile
The Diamondback 556C16H50B8NYR is a 16-inch 5.56x45mm NATO carbine-length replacement barrel built from 4150 chrome moly vanadium steel with black nitride finish. This OEM-spec barrel is engineered as a drop-in replacement for AR-15 platform rifles, letting you refresh or reconfigure your rifle without a full build. The 4150 chrome moly vanadium construction delivers the durability and heat resistance serious shooters expect, while the black nitride finish protects against corrosion and wear. No threads on the muzzle means this barrel ships as-is—perfect if you're running an existing upper assembly or planning your own muzzle device installation down the road.
Whether you're building a dedicated 5.56 upper, swapping barrels between uppers, or simply need a reliable replacement, a quality barrel is foundational to consistent accuracy and reliability. This Diamondback barrel offers that foundation at a straightforward spec: carbine-length gas system, milspec dimensions, and proven steel. Shooters choosing replacement barrels prioritize known metallurgy and fit, and this one delivers both.
The 16-inch length is the workhorse of the AR-15 world—short enough for home-defense or tactical use, long enough to wring out 5.56 ballistics for hunting or range work. The black nitride finish is both practical and low-maintenance, resisting corrosion without the fuss of constant upkeep.
Key Features
- 16-inch carbine-length gas system for AR-15 platform rifles
- 4150 chrome moly vanadium steel construction for durability and heat resistance
- Black nitride finish for corrosion resistance and extended service life
- No muzzle threads—ship as-is, thread later or use existing devices
- OEM replacement specification for drop-in fitment
- 5.56x45mm NATO chambering
Specifications
| Caliber | 5.56x45mm NATO |
| Barrel Length | 16 inches |
| Gas System | Carbine-length |
| Material | 4150 Chrome Moly Vanadium Steel |
| Finish | Black Nitride |
| Muzzle | No threads |
| Platform | AR-15 |
Frequently Asked Questions
Will this barrel fit my AR-15 upper receiver?
Yes, this is an OEM-spec 5.56x45mm NATO barrel designed as a drop-in replacement for standard AR-15 platform uppers with carbine-length gas systems. Confirm your current upper is chambered in 5.56 NATO and uses a carbine-length gas tube before installation.
What's the difference between a carbine-length and mid-length gas system?
Gas system length refers to where the gas port is drilled and how far the gas tube extends. Carbine-length is the traditional, most common AR-15 spec and pairs with carbine-length handguards and gas tubes. This barrel is carbine-length and will not be compatible with mid-length or rifle-length uppers.
Why does this barrel have no muzzle threads?
No threads means you get a clean muzzle end as-is. You can have threads cut at a gunsmith later, or if you already have a muzzle device from another barrel, you have full freedom to set it up how you want without paying for unnecessary threads upfront.
What maintenance does a black nitride finish require?
Black nitride is a hard, corrosion-resistant surface finish that requires no special maintenance beyond basic rifle care—wipe down after shooting, clean the bore as you normally would. It's more durable than blued finishes and resists rust in field conditions.
