Diamondback Firearms OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium/M4 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/M4 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

$91.49at Ammunition Depot

In stock checked Nov 3, 2026

Buy at Ammunition Depot

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Where to buy

Store	Price	Availability	Buy
Ammunition Depot Best price	$91.49checked Nov 3, 2026	In stock	Buy at Ammunition Depot
OpticsPlanet	$93.99Salechecked Nov 3, 2026	In stock	Buy at OpticsPlanet
Kentucky Gun Co	$94.30checked Nov 3, 2026	In stock	Buy at Kentucky Gun Co
Sportsman's Warehouse	$103.00checked Nov 3, 2026	In stock	Buy at Sportsman's Warehouse
GunMag Warehouse	$103.99checked Nov 3, 2026	In stock	Buy at GunMag Warehouse
Battlehawk Armory	$85.28checked Oct 28, 2026	Check store	Buy at Battlehawk Armory
Palmetto State Armory	$86.99checked Nov 3, 2026	Check store	Buy at Palmetto State Armory
Classic Firearms	$98.80checked Nov 3, 2026	Check store	Buy at Classic Firearms

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	$91.49
Battlehawk Armory	—	$85.28	$85.28
Classic Firearms	$98.80	$98.80	$98.80
GunMag Warehouse	$103.99	$103.99	$103.99
Kentucky Gun Co	$94.30	$94.30	$94.30
OpticsPlanet	$93.99	$93.99	$114.49
Palmetto State Armory	$86.99	$86.99	$86.99
Sportsman's Warehouse	$103.00	$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/M4 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 (5 in stock), from $85.28 to $103.99. 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/M4 Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov. 56x45mm NATO 16" Black - Specifications for Diamondback Firearms OEM Replacement FN Herstal M16 Barrel: Manufacturer: Diamondback Firearms Color: Black Nitride Finish: Nitride Caliber: 5.56x45mm NATO Barrel Length: 16 in Barrel Profile: Medium M4 Gas System Length: Carbine Length Firearms Threads Per Inch: 1/2x28 Barrel Twist Rate: 1-8 Barrel Material: 4150 CMV Steel Gun Make: FN Herstal Gun Model: M16 Weight: 1.8 lb Length: 16 in Diamondback 556C16MF50B8R OEM Replacement (M4 Contour) 5.56x45mm NATO 16" Black What firearm models does the manufacturer say Diamondback Firearms OEM Replacement FN Herstal M16 Barrel is compatible with? The manufacturer suggests that Diamondback Firearms OEM Replacement FN Herstal M16 Barrel is compatible with M16Diamondback Firearms 556C16MF50B8R: OEM Replacement Barrel FN Herstal M16 5.56x45mm NATO 16in Medium/M4 Profile Carbine-Length 1-8 Twist 1/2 x 28 Thread 4150 CrMov Black Nitride