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BSF Barrels 300BLK Pistol Gas 1/8 Twist - 8.5"


As low as: $426.55
Out of stock

BSF Barrels 300BLK Pistol Gas 1/8 Twist - 8.5"

Rainier Arms Free Ground Shipping

After turning down the barrel, we jacket a 416R Stainless steel match barrel in a roll-wrapped carbon fiber sleeve and load it under tension.  We use this jacketing method rather than wrapping the barrel in carbon fiber because this method of wrapping has been proven to trap heat and cause delamination.  The carbon fiber we use is specially designed to move at the same expansion rate as 416R stainless steel. We drill holes into the carbon fiber allowing air to move around the barrel and vent heat quicker without any delamination issues.  Using the Carbon Fiber this way keeps the rifling straighter the warmer the barrel gets because it's under tension. This allows us to maintain superior stiffness and strength while keeping the barrel extremely lightweight.



  • 8.5"- 17.4 oz
  • 6 Groove Button Rifling
  • Thread: 5/8" 24
  • .875 OD
  • Chambered in 300 Blackout
  • Pistol Gas
  • Twist Rate 1:8


More Information
SKU BSF-300BLK-8.5
Product Type Barrel
Manufacturer BSF Barrels
Barrel Length 8.5"
Caliber 300BLK