The Ballistic Advantage Modern Series Barrel (brand part no. BABL300001M) is an 8-inch .300 Blackout (7.62x35mm) AR-15 barrel machined from 4150 chrome moly vanadium steel in a DRP profile with a QPQ corrosion-resistant finish. Ballistic Advantage runs a .750-inch gas block journal on a pistol-length gas system, correct for a short-barrel .300 Blackout pistol build, and adds a QPQ-coated M4 feed ramp extension for reliable feeding. Because this 8-inch barrel is well under the 16-inch federal minimum for a rifle-configured lower, all NFA/ATF rules apply to how it can legally be assembled.

Key Specifications

• Chambered in .300 Blackout (7.62x35mm).
• 8-inch barrel length.
• 1:7-inch twist rate.
• Machined from 4150 chrome moly vanadium steel in a DRP profile.
• Finished in QPQ for corrosion resistance.
• Includes a QPQ-coated M4 feed ramp extension for reliable feeding.
• Runs a .750-inch gas block journal on a pistol-length gas system.
• Threaded muzzle, finished in black.

Frequently Asked Questions

What caliber is this barrel chambered in? .300 Blackout (7.62x35mm).

Is this barrel legal to install on any AR-15 lower? No. At 8 inches it is well under the federal 16-inch rifle minimum, so it may only go on a lower configured as a pistol, or on a lower that is a registered SBR or machine gun — installing it on a non-NFA rifle-configured lower is prohibited.

What gas system does this barrel use? A pistol-length gas system with a .750-inch gas block journal.

Buy the Ballistic Advantage Modern Series Barrel

Build a short, reliable .300 Blackout pistol with a DRP-profile Ballistic Advantage barrel. Order it from our AR barrels selection at our Lubbock, Texas gun shop for fast, direct shipping.