The Ballistic Advantage Modern Series .300 Blackout AR barrel (brand part number BABL300006M) is a 10-inch, pistol-length AR-15 barrel machined from chrome-moly vanadium steel for shooters building a short, hard-hitting .300 Blackout pistol or SBR. Ballistic Advantage finishes it in a QPQ corrosion-resistant coating that holds up to hard use and repeated cleanings. The 1-in-7 twist rate is matched to run the full range of .300 Blackout loads, from lightweight supersonic rounds to heavy subsonic loads paired with a suppressor. It’s a solid foundation for a compact, versatile .300 Blackout build.

Key Specifications

• Chambered in .300 AAC Blackout for supersonic and subsonic loads alike.
• Measures 10 inches, a pistol-length barrel suited to compact AR builds.
• Cut with a 1-in-7 twist rate, matched to stabilize the full range of .300 Blackout bullet weights.
• Machined from chrome-moly vanadium (CrMoV) steel for strength and heat resistance.
• Finished with a QPQ corrosion-resistant coating for long-term durability.
• Part of Ballistic Advantage’s Modern Series barrel line.

Frequently Asked Questions

What twist rate does this barrel use? It’s cut with a 1-in-7 twist, which stabilizes both light supersonic and heavy subsonic .300 Blackout loads.

Is this barrel rifle-length or pistol-length? At 10 inches, it’s a pistol-length barrel suited to compact .300 Blackout pistol and SBR builds.

What finish does it use? Ballistic Advantage applies a QPQ corrosion-resistant finish over the CrMoV steel.

Buy the Ballistic Advantage Modern Series .300 Blackout 10-Inch Pistol-Length AR Barrel

A short .300 Blackout build lives or dies on barrel quality, and this Ballistic Advantage barrel is built to handle both suppressed subsonic loads and full-power supersonic ammunition without drama. Pair it with anything else from our AR-15 barrels selection, and order it from our Lubbock, Texas gun shop for fast, insured shipping.