BRT 12.5″ OPTIMUM Hammer Forged Chrome Lined Barrel

Original price was: $325.00.Current price is: $284.78.

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Product Description

Black River Tactical Hammer Forged Chrome Lined Barrels are designed and built to meet the needs of serious shooters who demand the highest levels of accuracy and durability along with seamless suppressor compatibility.
Black River Tactical HF CL barrels start with the most durable and accurate blank possible using a precision cold hammer forging process and certified material. The barrels use a medium-light taper profile to keep weight down while maintaining strength. This produces a balanced weapon when a suppressor and other accessories are added. The barrels are finished with an advanced hard chrome lining process that maintains peak accuracy and withstands severe firing schedules.
Black River Tactical HF CL barrels deliver the performance to get the job done in demanding real-world conditions.


  • Hammer Forged for extreme durability and accuracy. BRT’s precision hammer forging process produces an exceptionally straight and smooth bore finish with ideal land and groove profiles, all of which are key to maintaining accuracy. The forging process also increases hardness and produces beneficial grain flow alignment which improves toughness.
  • Chrome Lined Chamber and Bore for excellent service life and resistance to corrosion. BRT’s industry-leading process was developed specifically to address the unique requirements of precision firearm barrels and includes 5 key improvements to ensure highly uniform and accurate results. This includes an electropolishing treatment before chrome lining.
  • 5.56 Chamber for compatibility with all high-pressure military 5.56 and civilian .223 ammunition. BRT’s multi-step process produces true mil-spec chamber dimensions with excellent concentricity and includes separate operations for throating and chamber polishing.
  • Gas System tuned for reliable use with and without a suppressor attached. BRT’s gas system configurations and gas port dimensions are the product of extensive engineering backed by exhaustive testing. The results are a balance of wide reliability margin, smooth operation, and seamless suppressor compatibility with near-zero “gas to face” issues.
  • Buffer Recommendations
    – Unsuppressed: H or CAR, VLTOR A5H0
    – Suppressed: H2, VLTOR A5H2


  • BRT Medium-Light Taper Profile (.750 Gas Block)
  • BRT EXC Length Gas System
  • 1/2-28 Suppressor-Ready Muzzle Thread
  • 5.56 NATO Chamber
  • 6R Rifling 1/7 Twist
  • Material: 4150 CrMoV Ordnance Grade Steel per Mil-B-11595E(AR)
  • Chrome Lined Chamber and Bore
  • Finish: Manganese Phosphate
  • Barrel Extension with Extended Feed Ramps
  • Weight: 21.7 oz


Technical Information


5.56 NATO / .223 Remington


4150 Chrome Moly Vanadium


Manganese Phosphate

Barrel Twist


Gas Block Size




Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit