Ballistic Advantage 300 Blackout 9" AR-15 Barrel 1:7 QPQ CMV
Ballistic Advantage
$152.00
(No reviews yet)
Write a Review
Ballistic Advantage
Ballistic Advantage 300 Blackout 9" AR-15 Barrel 1:7 QPQ CMV
The Ballistic Advantage 300 Blackout 9" Modern Series Barrel delivers precision-machined performance for AR-15 pistol builds, combining premium 4150 Chrome Moly Vanadium steel with a durable QPQ corrosion-resistant finish engineered to handle both supersonic and subsonic 300 BLK loads with authority.
- Machined from 4150 Chrome Moly Vanadium steel for exceptional strength and longevity
- QPQ corrosion-resistant finish inside and out for superior rust and wear protection
- 1:7 twist rate stabilizes both supersonic and subsonic 300 Blackout projectiles reliably
- Pistol-length gas system optimized for reliable cycling in a compact 9" platform
- 5/8x24 threaded muzzle ready for suppressors, muzzle brakes, or flash hiders
- QPQ-coated M4 feed ramp extension ensures smooth, consistent feeding under stress
Who This Is For
This barrel is purpose-built for shooters assembling a compact 300 Blackout AR-15 pistol — whether for home defense, a suppressed SBR build on a registered lower, or a range-ready pistol configuration. It's an ideal upgrade for anyone who wants the hard-hitting performance of 300 BLK in a maneuverable, short-barreled package without sacrificing materials or finish quality. Note: All NFA/ATF rules apply. This barrel may only be used with a registered SBR lower, registered machine gun lower, or a pistol-configuration firearm. Possession on a standard non-NFA rifle lower is prohibited.
Specifications
| Brand | Ballistic Advantage |
|---|---|
| Caliber | .300 Blackout |
| Barrel Length | 9 inches |
| Material | 4150 Chrome Moly Vanadium (CMV) |
| Finish | QPQ Corrosion Resistant |
| Profile | DRP (Dimple Rifle Profile) |
| Gas System | Pistol Length |
| Gas Block Journal | .750" |
| Twist Rate | 1:7" |
| Muzzle Threading | 5/8x24 |
| Feed Ramps | M4 (QPQ Coated) |
| Weight | 21 oz |
| Platform | AR-15 |
| NFA Status | NFA Rules Apply — Pistol/SBR Use Only |
Frequently Asked Questions
Can I install this barrel on a standard AR-15 rifle lower receiver?
No. Because this barrel is only 9 inches in length, federal NFA regulations prohibit its use on a standard (non-NFA) rifle lower receiver. It may legally be installed on a pistol-configuration firearm, a registered Short Barreled Rifle (SBR) lower, or a registered machine gun lower. Always ensure your build is compliant with all applicable federal, state, and local laws before purchasing.
Will this barrel work with a suppressor for subsonic 300 Blackout loads?
Yes — this barrel is an excellent choice for suppressed builds. The 5/8x24 threaded muzzle is the standard thread pitch for 300 Blackout suppressors, and the 1:7 twist rate provides reliable stabilization of heavy subsonic projectiles (typically 200–220 grain). The pistol-length gas system is tuned for a 9" barrel, though suppressor use may require an adjustable gas block to fine-tune cycling with varying loads.
What gas block does this barrel require, and is one included?
This barrel features a .750" gas block journal, which is the standard low-profile journal size for AR-15 pistol-length barrels. A gas block and gas tube are not included — you will need to source a compatible .750" gas block separately. A low-profile adjustable gas block is recommended for suppressed or precision builds to optimize cycling across different ammunition types.
