BRT 10.5″ PRO 5.56 Barrel


In stock


Product Description

Black River Tactical PRO 5.56 Barrels are designed and built to meet the needs of professional shooters who require a balance of accuracy, durability, and value. Black River Tactical PRO 5.56 barrels start with a high-grade stress relieved blank using a precision button rifling process and certified material. The barrels use a medium taper profile to keep weight down while maintaining strength. This produces a balanced weapon when other accessories are added. The barrels are finished with a QPQ Nitride process that maintains peak accuracy and withstands challenging environments. Black River Tactical PRO 5.56 barrels deliver the performance to get the job done in demanding real-world conditions.


  • Button Rifled and Stress Relieved for consistent accuracy. BRT’s precision button rifling process produces an exceptionally straight and smooth bore finish, which is key to maintaining accuracy.
  • QPQ Nitride Chamber and Bore for excellent service life and resistance to corrosion. More than a surface finish, this treatment converts the outer surfaces of the steel into a hard composition with similar properties to hard chrome plating, but without any dimensional changes. This new surface improves extraction and velocity while resisting fouling and corrosion.
  • 556 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 a wide variety of ammunition. 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 and smooth operation.
  • Buffer Recommendations:
    • H or H2, VLTOR A5H1


  • BRT Midweight Taper Profile
  • .750 Gas Block Journal ( Compatible with Front Site Base )
  • CAR Length Gas System
  • NSWC Crane Mk18 Spec .071 Gas Port Size
  • 1/2-28 Suppressor-Ready Muzzle Thread
  • 5.56 NATO Chamber
  • 1/7 Twist
  • 4150 CrMoV Ordnance Grade Steel per Mil-B-11595E(AR)
  • QPQ Nitride Finish
  • M4 Barrel Extension with Extended Feed Ramps
  • Weight: 19.0 oz


Technical Information


5.56 NATO / .223 Remington


4150 Chrome Moly Vanadium


QPQ Corrosion Resistant

Barrel Twist


Gas Block Size


Thread Pitch

1/2 x 28



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