Mk12 18" Stainless Steel Rifle Length Gas System

Name: Mk12 18" Stainless Steel Rifle Length Gas System
Brand: Bravo Company MFG
Availability: InStock

Bravo Company MFG · Barrels

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Best price

$383.95at Brownells

In stock checked Oct 1, 2026

Buy at Brownells

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Where to buy

Store	Price	Availability	Buy
Brownells Best price	$383.95checked Oct 1, 2026	In stock	Buy at Brownells
Ammunition Depot	$394.49checked Oct 1, 2026	In stock	Buy at Ammunition Depot
Palmetto State Armory	$427.99checked Oct 1, 2026	Check store	Buy at Palmetto State Armory

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: $383.95 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Ammunition Depot	$394.49	$394.49	$394.49
Brownells	$383.95	$383.95	$383.95
Palmetto State Armory	$427.99	$427.99	$427.99

Since Sep 27, 2026.

About this part

The Mk12 18" Stainless Steel Rifle Length Gas System is an 18" AR-15 barrel from Bravo Company MFG with a rifle gas system. It's sold by 3 stores (2 in stock), from $383.95 to $427.99. The lowest in-stock price in the last 30 days was $383.95 at Brownells.

Fits and works with

Gas system: Rifle · Handguards
Barrel length: 18" · Handguards

Specifications

Manufacturer: Bravo Company MFG
Platform: AR-15
Barrel length: 18"

From the manufacturer

A Premium-Grade Barrel for Serious Target Shooters

The Bravo Company BCM Mk12 18" Stainless Steel Barrel kit enables you to upgrade your AR-15 with the same barrel BCM puts on their Precision rifles. The barrel comes ready to install on your rifle, with BCM low-profile gas block and a gas tube.

The BCM Mk12 barrel is machined from extra-hard 410 stainless steel that is more corrosion-resistant than the 416 stainless alloy commonly used on rifle barrels and has a tough, abrasion-resistant, anti-friction IonBond PVD finish.

Bravo Company’s BCM Mk12 18" Stainless Steel Barrel comes with a 5.56 NATO match (USMC SAM-R) chamber and hand-lapped 1-8" button rifling for superb accuracy potential. M4-type feed ramps ensure the rounds make their way into that chamber consistently and reliably.

Phosphate finished mil-spec low profile gas block
Rifle-length gas system for gentler, reliable cycling
18" length gives a balance of compactness and additional velocity for improved long-range performance
.750" O.D. at gas port
Barrel extension included & installed
1/2"-28 tpi muzzle threads (muzzle device not included)

The Bravo Company BCM Mk 12 18" Stainless Steel Barrel has a mid-weight profile to so it’s rigid enough to resist accuracy-compromising heat warpage but not so heavy it makes the rifle a pain to lug around!