Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov

Name: Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov
Brand: Diamondback
Availability: InStock

Diamondback · Barrels

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Best price

$103.00at MidwayUSA

In stock checked Nov 3, 2026

Buy at MidwayUSA

Compare 8 stores

Where to buy

Store	Price	Availability	Buy
MidwayUSA Best price	$103.00checked Nov 3, 2026	In stock	Buy at MidwayUSA
Battlehawk Armory	$89.38Salechecked Oct 20, 2026	Check store	Buy at Battlehawk Armory
Classic Firearms	$98.80checked Nov 3, 2026	Check store	Buy at Classic Firearms
Palmetto State Armory	$102.99Salechecked Oct 19, 2026	Check store	Buy at Palmetto State Armory
Ammunition Depot	$91.49checked Oct 20, 2026	Out of stock	Buy at Ammunition Depot
OpticsPlanet	$102.49Salechecked Nov 3, 2026	Out of stock	Buy at OpticsPlanet
Sportsman's Warehouse	$103.00checked Oct 20, 2026	Out of stock	Buy at Sportsman's Warehouse
Kentucky Gun Co	$110.99checked Nov 3, 2026	Out of stock	Buy at Kentucky Gun Co

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

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Lowest in-stock price in the last 30 days: $91.49 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	—	$91.49	$91.49
Battlehawk Armory	—	$89.38	$89.38
Classic Firearms	$98.80	$98.80	$98.80
Kentucky Gun Co	$110.99	$94.30	$110.99
MidwayUSA	$103.00	$103.00	$103.00
OpticsPlanet	$102.49	$93.99	$105.99
Palmetto State Armory	—	$102.99	$102.99
Sportsman's Warehouse	—	$103.00	$103.00

Since Oct 12, 2026.

About this part

The Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov is a 16" 5.56 / .223 barrel from Diamondback with a carbine gas system. It's sold by 8 stores (1 in stock), from $89.38 to $110.99. The lowest in-stock price in the last 30 days was $91.49 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: Carbine · Handguards
Muzzle thread: 1/2x28 · Muzzle devices
Barrel length: 16" · Handguards

Specifications

Manufacturer: Diamondback
Platform: AR-15
Caliber: 5.56 mm NATO
Gas system: Carbine
Barrel length: 16"
Thread pattern: ½ x 28

From the manufacturer

Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov. Made of 4150 CMV with a carbine-length gas system. Specifications for Diamondback Firearms OEM Replacement FN Herstal M16 Carbine-Length Medium Profile Barrel: Manufacturer: Diamondback Firearms Color: Black Nitride Finish: Nitride Caliber: 5.56x45mm NATO Barrel Profile: Medium Gas System Length: Carbine Length Gas Block Journal Size-Diameter: .750 in Barrel Twist Rate: 1-8 Barrel Material: 4150 CMV Steel Gun Make: FN Herstal Gun Model: M16 Condition: New Package Contents: Diamondback Firearms OEM Replacement FN Herstal M16 Carbine-Length Medium Profile Barrel What firearm models does the manufacturer say Diamondback Firearms OEM Replacement FN Herstal M16 Carbine-Length Medium Profile Barrel is compatible with? The manufacturer says that Diamondback Firearms OEM Replacement FN Herstal M16 Carbine-Length Medium Profile Barrel is compatible with M16Diamondback Firearms 556C16M50B8R: OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black Nitride