5.5" Barrel 9mm Carbon Fiber 1-10 Twist

Lightweight Match-Quality Barrel for Your Pistol-Caliber AR-15

BSF Barrels builds their 9mm Luger AR-15 carbon fiber barrels with the same care that goes into a top-quality match barrel to ensure that you’ll achieve the best possible accuracy from your AR pistol, SBR, or carbine. All BSF barrels are turned from ordnance-grade 416R stainless steel, then given a roll-wrapped, tensioned, carbon fiber sleeve. The sleeve keeps weight down while providing excellent rigidity, plus enhanced cooling.

BSF uses this sleeve method on their 9mm Luger AR-15 barrels rather than simple carbon fiber wrapping because they believe wrapping traps heat and is prone to delamination. Further, BSF uses a special carbon fiber that expands at the same rate as 416R, and holes drilled into the jacket allow air to circulate around the barrel and vent heat quickly. Less heat distortion means far less risk of accuracy fade as your 9mm chambered AR-15’s barrel heats up.

• 5R button-rifled
• 1/2"-28 tpi muzzle threads
• .875" O.D.
• Barrel extension included
• Multiple lengths available for pistol, SBR, and carbine installations
• EACH barrel quality-inspected by experience technician before leaving factory

BSF offers their 9mm 9mm Luger AR-15 barrels with a 1-10" twist rate on 5.5" and 8.5" models, and a full 1-14" twist on 10.5" and 16.5" barrels.