FN America .223 Rem/5.56 16" Mid-Length Barrel, Chrome Lined Black Phosphate - 36422
$279.99 at GunMag Warehouse · 9 stores
In stock
FN America .223 Rem/5.56 18" Rifle Barrel, Chrome Lined Black Phosphate - 36423
FN · Barrels
No ratings yetBest price
$279.99at GunMag Warehouse
In stock Lowest in 30 dayschecked Nov 13, 2026
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
- Manufacturer
- FN
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Barrel length
- 18"
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| GunMag Warehouse Best price | $279.99checked Nov 13, 2026 | In stock | Buy at GunMag Warehouse | |
| OpticsPlanet | $349.00Salechecked Nov 13, 2026 | In stock | Buy at OpticsPlanet | |
| Ammunition Depot | $349.00checked Nov 13, 2026 | In stock | Buy at Ammunition Depot | |
| MidwayUSA | $349.99checked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| Battlehawk Armory | $321.60Salechecked Nov 13, 2026 | Check store | Buy at Battlehawk Armory | |
| AR15Discounts 5% off | $349.00checked Nov 13, 2026 | Check store | Buy at AR15Discounts | |
| Dirty Bird | $349.00checked Nov 13, 2026 | Check store | Buy at Dirty Bird | |
| Classic Firearms | $349.00checked Nov 13, 2026 | Check store | Buy at Classic Firearms | |
| GrabAGun | $349.00Salechecked Nov 12, 2026 | Check store | Buy at GrabAGun | |
| Palmetto State Armory | $349.99Salechecked Nov 13, 2026 | Check store | Buy at Palmetto State Armory | |
| Brownells 17.76% off · ends Nov 15 · exclusions apply | $349.00checked Nov 13, 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
Lowest in-stock price in the last 30 days: $279.99 at GunMag Warehouse. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| AR15Discounts | $349.00 | $349.00 | $349.00 |
| Ammunition Depot | $349.00 | $349.00 | $349.00 |
| Battlehawk Armory | $321.60 | $321.60 | $321.60 |
| Brownells | $349.00 | $349.00 | $349.00 |
| Classic Firearms | $349.00 | $349.00 | $349.00 |
| Dirty Bird | $349.00 | $349.00 | $349.00 |
| GrabAGun | $349.00 | $349.00 | $349.00 |
| GunMag Warehouse | $279.99 | $279.99 | $279.99 |
| MidwayUSA | $349.99 | $282.84 | $349.99 |
| 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 from FN. It's sold by 11 stores (4 in stock), from $279.99 to $349.99. The lowest in-stock price in the last 30 days was $279.99 at GunMag Warehouse.
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.
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