Ballistic Advantage 16" 300 Blackout AR-15 Barrel - Modern Series, QPQ Finish, 4150 CMV Steel, DPR Profile

The Ballistic Advantage 16" 300 Blackout AR-15 barrel pairs a practical mid-length profile with the versatility of subsonic rifle cartridge performance. Built from 4150 Chrome Moly Vanadium steel and finished with a QPQ corrosion-resistant coating, this Modern Series barrel is engineered for shooters running suppressed setups, hog hunting, or close-quarters rifle builds where the 300 Blackout's subsonic capability shines. The DPR profile—a modern intermediate contour—balances rigidity and weight, making it equally at home on a precision build or a lightweight, maneuverable platform.

The 1:7 twist rate is optimized for the full range of 300 Blackout ammunition, from heavy subsonic loads to standard velocity rounds. The .750" gas block journal accepts standard AR-pattern gas blocks, and the QPQ-coated M4 feed ramp extension ensures reliable feeding and durability under sustained use. This barrel is designed to drop into any AR-15 lower receiver—though users must comply with all federal NFA/ATF regulations regarding barrel length, overall firearm configuration, and registration requirements.

Whether you're building a dedicated 300 Blackout rifle, upgrading an existing platform, or experimenting with subsonic suppressed shooting, this Ballistic Advantage barrel delivers the fit, finish, and performance you'd expect from a reputable manufacturer. The QPQ finish resists corrosion in field conditions, and the precision machining ensures consistent performance downrange.

Key Features

• 16" barrel length in 300 Blackout chambering
• 4150 Chrome Moly Vanadium steel construction
• QPQ corrosion-resistant finish throughout
• DPR modern intermediate profile for balance of weight and rigidity
• 1:7 inch twist rate optimized for subsonic and standard 300 Blackout loads
• .750" gas block journal for standard AR-pattern gas blocks
• QPQ-coated M4 feed ramp extension for reliable feeding

Specifications

Frequently Asked Questions

Is this barrel compatible with all AR-15 lower receivers?

This barrel is designed for standard AR-15 lower receivers and accepts .750" gas blocks. However, federal NFA/ATF regulations apply to all AR-15 builds. A 16" barrel length is long enough for standard rifle configuration, but always verify your firearm's overall configuration and local regulations before assembly.

What's the advantage of the 1:7 twist rate?

The 1:7 twist is optimized specifically for 300 Blackout ammunition across the entire spectrum—subsonic, standard velocity, and higher-performance loads. This twist rate provides stability and reliable feeding whether you're running heavy suppressed rounds or lighter hypervelocity cartridges.

Does this barrel come with a gas block or other components?

This is a barrel only. You will need a gas block, barrel nut, and appropriate tools to install it. The .750" gas block journal accepts standard AR-pattern gas blocks.

What does the QPQ finish do?

QPQ is a salt-bath corrosion-resistant coating applied to both the barrel and the M4 feed ramp extension. It resists rust and wear from field use, harsh environments, and extended suppressed shooting, making it a durable choice for regular use.