Barrel 5.56mm NATO 18 1-8 Rifle Length Black

Name: Barrel 5.56mm NATO 18 1-8 Rifle Length Black
Brand: Brownells
Availability: OutOfStock

Brownells · Barrels

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Best price

$249.99at Brownells

Out of stock checked Oct 2, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$249.99checked Oct 2, 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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Dashed line = out of stock. Tracking since Sep 27, 2026.

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Store	Latest	Lowest	Highest
Brownells	$249.99	$249.99	$249.99

Since Sep 27, 2026.

About this part

The Barrel 5.56mm NATO 18 1-8 Rifle Length Black is a 5.56 / .223 barrel from Brownells with a rifle gas system. One store lists it, Brownells at $249.99.

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: Rifle · Handguards

Specifications

Manufacturer: Brownells
Color: Black
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

A MK12-Profile Barrel for Your Precision AR-15

The MK12 platform received fame for its use with US Special Operations groups as a semi-automatic precision rifle, and one of the essential elements of the platform is now offered as the Brownells 5.56 NATO MK12 Profile AR-15 barrel.

The Brownells 5.56 NATO MK12 Profile AR-15 barrel are completely machined and finished by craftsmen in the USA and are made using stainless-steel bar stock that's 416-R certified steel and completely stress relieved. The barrels measure 18 inches long.

Features 1:8 rate of twist
Suppressor ready with 1/2x28 TPI threads
Features 11-degree target crown
Each barrel undergoes magnetic-particle inspection for quality

The Brownells 5.56 NATO MK12 Profile AR-15 barrel also features a complete nitride treatment, as well as precision machining for perfect suppressor compatibility.