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Ar-15 Modern Series Barrels .300 Blackout - Ar-15 Pistol Length 10 Barrel .300 Blackout
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$156.99
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SKU: 915000051
Overview
Built for a compact .300 Blackout setup, this 6-inch Modern Series barrel is intended for pistol-length configurations where a shorter profile is preferred. It is machined from 4150 Chrome Moly Vanadium steel and finished with QPQ corrosion resistance, with a QPQ coated M4 feed ramp extension. The barrel includes a .750" gas block journal and a 1:7 twist rate, making it a straightforward option for a purpose-built build. NFA/ATF rules apply, so it should be selected only in accordance with the listed legal requirements.
Why Hunters Choose the Ballistic Advantage
6-inch .300
Blackout barrel for compact pistol-length
Machined From
4150 Chrome Moly Vanadium steel
Qpq Corrosion-resistant
Finish adds a protective surface
Qpq-coated M4
Feed ramp extension included
.750-inch Gas
Block journal supports listed compatibility
Key Features
- .300 Blackout chambered Modern Series barrel
- 6-inch barrel length
- Machined from 4150 Chrome Moly Vanadium steel
- QPQ corrosion resistant finish
- QPQ coated M4 feed ramp extension
- .750-inch gas block journal
- 1:7-inch twist rate
Best Used For
- Hunters building a .300 Blackout pistol-length setup within applicable NFA/ATF rules.
- Shooters needing a 6-inch Modern Series barrel for compact AR-15 configurations.
- Users who want a barrel with a .750-inch gas block journal and 1:7 twist rate.
- Builders looking for Ballistic Advantage barrel components for a .300 Blackout project.
Specifications
| Barrel Length | 6 inch |
|---|---|
| Blade Finish | QPQ Corrosion Resistant |
| Caliber | 300 Blackout |
| Country Of Origin | Ballistic Advantage |
| Feed Ramp Extension | QPQ coated M4 |
| Gas Block Journal | .750" |
| Material | 4150 Chrome Moly Vanadium |
| Nfaatf Notice | All NFA/ATF Rules Apply |
| Twist Rate | 1:7 inches |
Pros
- 6-inch .300 Blackout barrel for compact pistol-length builds.
- Machined from 4150 Chrome Moly Vanadium steel.
- QPQ corrosion-resistant finish adds a protective surface treatment.
- QPQ-coated M4 feed ramp extension included.
- .750-inch gas block journal supports listed compatibility.
- 1:7 twist rate specified for this barrel.
Considerations & Trade-offs
- This 6-inch barrel is intended for .300 Blackout builds, so it is a specialized choice rather than a general-purpose option.
- The short length makes it suited to compact configurations, but it is not a substitute for a longer barrel when a different setup is required.
- NFA/ATF rules apply, and possession or installation depends on the receiver and firearm configuration, so compliance needs to be verified before purchase.
- The .750" gas block journal and 1:7 twist rate are fixed specifications, which means compatibility should be checked against the rest of the build before ordering.
Suggested Comparisons
- AR-15 barrels
- Complete upper receivers
- AR-15 pistol components
- 300 Blackout ammunition
Suggested Accessories
- AR-15 upper receiver
- Gas block
- Handguard
- Muzzle device
Frequently Asked Questions
What caliber is this barrel chambered for?
It is chambered in .300 Blackout.
What is the barrel length?
The product description states 6 inches.
What material and finish are listed for this barrel?
It is listed as 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish.
What gas block journal size is specified?
The listed gas block journal is .750 inch.
What twist rate is provided?
The listed twist rate is 1:7 inches.