Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 7in Heavy Profile Pistol-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black
$76.49 at Ammunition Depot · 6 stores
In stock
Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 5.5in Heavy Profile Pistol-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black
No ratings yetBest price
$78.49at Ammunition Depot
In stock checked Oct 13, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $78.49checked Oct 13, 2026 | In stock | Buy at Ammunition Depot | |
| Kentucky Gun Co | $80.50checked Oct 13, 2026 | In stock | Buy at Kentucky Gun Co | |
| Sportsman's Warehouse | $88.00checked Oct 13, 2026 | In stock | Buy at Sportsman's Warehouse | |
| OpticsPlanet | $99.99Salechecked Oct 13, 2026 | In stock | Buy at OpticsPlanet | |
| Battlehawk Armory | $72.80checked Oct 13, 2026 | Check store | Buy at Battlehawk Armory | |
| Palmetto State Armory | $87.99Salechecked Oct 13, 2026 | Check store | Buy at Palmetto State Armory |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Lowest in-stock price in the last 30 days: $78.49 at Ammunition Depot. Dashed line = out of stock. Tracking since Oct 12, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Ammunition Depot | $78.49 | $78.49 | $78.49 |
| Battlehawk Armory | $72.80 | $72.80 | $72.80 |
| Kentucky Gun Co | $80.50 | $80.50 | $80.50 |
| OpticsPlanet | $99.99 | $99.99 | $99.99 |
| Palmetto State Armory | $87.99 | $87.99 | $87.99 |
| Sportsman's Warehouse | $88.00 | $88.00 | $88.00 |
Since Oct 12, 2026.
About this part
The Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 5.5in Heavy Profile Pistol-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black is a 5.5" 5.56 / .223 barrel from Diamondback with a pistol gas system. It's sold by 6 stores (4 in stock), from $72.80 to $99.99. The lowest in-stock price in the last 30 days was $78.49 at Ammunition Depot.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Pistol · Handguards
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 5.5" · Handguards
Specifications
- Manufacturer
- Diamondback
- Color
- Black
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Gas system
- Pistol
- Barrel length
- 5.5"
- Thread pattern
- ½ x 28
From the manufacturer
Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 5.5in Heavy Profile Pistol-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black. 50/7in black nitride barrel from Diamondback Made of 4150 CMV with a pistol-length gas system. Specifications for Diamondback Firearms OEM Replacement FN Herstal M16 Pistol-Length Heavy Profile Barrel: Manufacturer: Diamondback Firearms Color: Black Nitride Finish: Nitride Caliber: 5.56x45mm NATO Barrel Profile: Heavy Gas System Length: Pistol Length Firearms Threads Per Inch: 1/2x28 Barrel Twist Rate: 1-8 Barrel Material: 4150 CMV Steel Gun Make: FN Herstal Gun Model: M16 Package Contents: Diamondback Firearms OEM Replacement FN Herstal M16 Pistol-Length Heavy Profile Barrel What firearm models does the manufacturer say Diamondback Firearms OEM Replacement FN Herstal M16 Pistol-Length Heavy Profile Barrel is compatible with? The manufacturer suggests that Diamondback Firearms OEM Replacement FN Herstal M16 Pistol-Length Heavy Profile Barrel is compatible with M16Diamondback Firearms 556P55H50B8R: OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 5.5in Heavy Profile Pistol-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black Nitride
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