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Ar-15 Mk12 Barrel 18'''' Stainless Steel - Mk12 18'''' Stainless Steel Rifle Length Gas System
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$383.95
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SKU: 100023906
Overview
This barrel kit is built for shooters who want a precision-focused AR-15 setup with components ready for installation. It includes a BCM low-profile gas block and gas tube, and it is chambered in 5.56 NATO with hand-lapped 1-8" button rifling for accuracy-oriented use. The extra-hard 410 stainless steel construction and IonBond PVD finish add a durable, low-friction surface, while M4-type feed ramps support its role in a serious rifle build. For hunters and target shooters who prioritize a refined, purpose-built upper, this is a premium option without unnecessary extras.
Why Hunters Choose the Bravo Company
Includes Bcm
Low-profile gas block and gas
Uses 18-inch
Rifle-length gas system
5.56 Nato
Match (USMC SAM-R) chamber
Hand-lapped 1-8"
Button rifling supports accuracy-focused builds
Ionbond Pvd
Finish adds a tough, abrasion-resistant
Key Features
- 18-inch BCM Mk12 stainless steel barrel kit for AR-15 upgrades
- Includes BCM low-profile gas block and gas tube for ready installation
- Machined from extra-hard 410 stainless steel
- Features a 5.56 NATO match (USMC SAM-R) chamber
- Hand-lapped 1:8 button rifling for accuracy potential
- IonBond PVD finish adds abrasion-resistant, anti-friction protection
- M4-type feed ramps included
Best Used For
- Serious AR-15 builders wanting a ready-to-install 18-inch precision barrel kit
- Target shooters seeking a 5.56 NATO match chamber and 1-8" rifling setup
- Users upgrading an AR-15 with BCM low-profile gas block and gas tube included
- Hunters who prefer a stainless steel barrel kit for a precision-oriented rifle build
Specifications
| Barrel Length | 18 in |
|---|---|
| Blade Finish | IonBond PVD |
| Chamber | 5.56 NATO match (USMC SAM-R) |
| Feed Ramps | M4-type |
| Gas System | Rifle length |
| Included Components | BCM low-profile gas block and gas tube |
| Material | 410 stainless steel |
| Rifling | 1-8" button rifling |
Pros
- Includes BCM low-profile gas block and gas tube for a ready-to-install kit
- Uses an 18-inch stainless steel barrel with rifle-length gas system
- Features a 5.56 NATO match (USMC SAM-R) chamber
- Hand-lapped 1-8" button rifling supports accuracy-focused builds
- IonBond PVD finish adds a tough, abrasion-resistant surface
- Machined from extra-hard 410 stainless steel
Considerations & Trade-offs
- This is a complete barrel kit rather than a standalone barrel, so it includes components you may not need if you already have a compatible gas block or gas tube.
- It is built around an 18-inch rifle-length setup, which favors a precision-oriented configuration over a shorter, more compact AR-15 build.
- The 5.56 NATO match (USMC SAM-R) chamber and 1-8" rifling are geared toward accuracy potential, but they also make this a specialized choice rather than a general-purpose barrel option.
- The IonBond PVD finish and stainless-steel construction are premium features, which are reflected in the price compared with more basic barrel setups.
Suggested Comparisons
- AR-15 barrel kits
- Precision rifle barrels
- Gas blocks and gas tubes
- Rifle-length gas system components
Suggested Accessories
- Barrel nut wrench
- Gas block
- Gas tube
- Upper receiver vise block
Frequently Asked Questions
What comes included with the BCM Mk12 18" Stainless Steel Barrel kit?
The kit includes the 18" stainless steel barrel, a BCM low-profile gas block, and a gas tube.
What chamber does this barrel use?
It comes with a 5.56 NATO match (USMC SAM-R) chamber.
What rifling specification is listed for this barrel?
The description lists hand-lapped 1-8" button rifling.
What finish is on the barrel?
The barrel has an IonBond PVD finish.
What material is the barrel made from?
The barrel is machined from extra-hard 410 stainless steel.