FN America .223 Rem/5.56 18" Rifle Barrel, Chrome Lined Black Phosphate - 36423

Name: FN America .223 Rem/5.56 18" Rifle Barrel, Chrome Lined Black Phosphate - 36423
Availability: InStock

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Best price

$282.84at MidwayUSA

In stock Sale checked Oct 1, 2026

Buy at MidwayUSA

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Where to buy

Store	Price	Availability	Buy
MidwayUSA Best price	$282.84Salechecked Oct 1, 2026	In stock	Buy at MidwayUSA
OpticsPlanet	$349.00Salechecked Oct 1, 2026	In stock	Buy at OpticsPlanet
Ammunition Depot	$349.00checked Oct 1, 2026	In stock	Buy at Ammunition Depot
Battlehawk Armory	$321.60Salechecked Oct 1, 2026	Check store	Buy at Battlehawk Armory
Palmetto State Armory	$349.99Salechecked Oct 1, 2026	Check store	Buy at Palmetto State Armory
Brownells	$349.00checked Oct 1, 2026	Out of stock	Buy at Brownells

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: $282.84 at MidwayUSA. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Ammunition Depot	$349.00	$349.00	$349.00
Battlehawk Armory	$321.60	$321.60	$321.60
Brownells	$349.00	$349.00	$349.00
MidwayUSA	$282.84	$282.84	$282.84
OpticsPlanet	$349.00	$349.00	$349.00
Palmetto State Armory	$349.99	$349.99	$349.99

Since Sep 27, 2026.

About this part

The FN America .223 Rem/5.56 18" Rifle Barrel, Chrome Lined Black Phosphate - 36423 is an 18" 5.56 / .223 barrel. It's sold by 6 stores (3 in stock), from $282.84 to $349.99. The lowest in-stock price in the last 30 days was $282.84 at MidwayUSA.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Barrel length: 18" · Handguards

Specifications

Platform: AR-15
Barrel length: 18"

From the manufacturer

FN AR-15 Hammer-Forged Barrels have a chrome-lined chamber and bore to help resist corrosion and provide heat erosion resistance. Their barrel is forged from Chrome Moly Vanadium steel and built for the .750" diameter gas block with 1/2x28" threaded muzzle. It has an M4-style feed ramp and barrel extension for consistent and reliable feeding. This barrel is chambered in 5.56 NATO with a 1:7" twist with a manganese phosphate finish.