FN America .223 Rem/5.56 16" Carbine Barrel, Chrome Lined Black Phosphate - 36421

Name: FN America .223 Rem/5.56 16" Carbine Barrel, Chrome Lined Black Phosphate - 36421
Availability: OutOfStock

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$298.99at Palmetto State Armory

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Store	Price	Availability	Buy	Add to build
Palmetto State Armory Best price	$298.99not checked recently	Check store	Buy at Palmetto State Armory
Brownells	$329.99checked Oct 1, 2026	Out of stock	Buy at Brownells

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Dashed line = out of stock. Tracking since Sep 27, 2026.

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Store	Latest	Lowest	Highest
Brownells	$329.99	$329.99	$329.99

Since Sep 27, 2026.

About this part

The FN America .223 Rem/5.56 16" Carbine Barrel, Chrome Lined Black Phosphate - 36421 is a 16" 5.56 / .223 barrel with a carbine gas system. It's sold by 2 stores, from $298.99 to $329.99.

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
Barrel length: 16" · Handguards

Specifications

Platform: AR-15
Barrel length: 16"

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. There 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.