Ballistic Advantage 5.56 AR-15 Barrel 13.9" Mid-Length 1/7 Twist
Ballistic Advantage
$161.50
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Ballistic Advantage
Ballistic Advantage 5.56 AR-15 Barrel 13.9" Mid-Length 1/7 Twist
The Ballistic Advantage 5.56 NATO 13.9" Government Profile Mid-Length barrel delivers serious performance in a compact package, purpose-built for shooters who demand precision, durability, and reliability from every build.
- Machined from 4150 Chrome Moly Vanadium steel for exceptional strength and longevity
- QPQ Corrosion Resistant Finish protects against rust, wear, and harsh environments
- Mid-length gas system reduces felt recoil and improves cycling consistency
- 1:7" twist rate stabilizes a wide range of 5.56 NATO and .223 Rem projectiles
- QPQ coated M4 feed ramp extension ensures smooth, reliable chambering every time
- 1/2x28 threaded muzzle supports suppressors, flash hiders, and muzzle brakes
Who This Is For
This barrel is an ideal choice for AR-15 builders and SBR enthusiasts who want a shorter, more maneuverable platform without sacrificing the reliability and dwell time benefits of a mid-length gas system. Whether you're building a duty-ready rifle, a suppressor host, or a high-performance range gun, this Ballistic Advantage barrel provides the precision machining and premium materials your build deserves.
Specifications
| Brand | Ballistic Advantage |
|---|---|
| Caliber | 5.56 NATO / .223 Rem |
| Barrel Length | 13.9" |
| Profile | Government |
| Material | 4150 Chrome Moly Vanadium |
| Finish | QPQ Corrosion Resistant |
| Twist Rate | 1:7" |
| Gas System | Mid-Length |
| Gas Block Journal | .750" |
| Muzzle Thread | 1/2x28 |
| Feed Ramps | M4, QPQ Coated |
Frequently Asked Questions
Why choose a mid-length gas system on a 13.9" barrel?
A mid-length gas system on a 13.9" barrel offers a longer dwell time compared to a carbine-length system, which translates to smoother cycling, reduced bolt carrier group wear, and noticeably softer felt recoil. This makes the mid-length configuration a preferred choice for suppressed builds and shooters who prioritize reliability and shooter comfort over a shorter gas port placement.
What bullet weights does the 1:7" twist rate stabilize best?
The 1:7" twist rate is optimized for heavier 5.56 NATO projectiles in the 62–77 grain range, including popular loads like M855 (62gr) and MK262 (77gr). It will also reliably stabilize lighter 55 grain .223 Rem ammunition, making this barrel highly versatile for both training and defensive applications.
Do I need to pin and weld this barrel to be compliant with federal regulations?
At 13.9" in length, this barrel falls below the 16" minimum required for a Title I rifle under the National Firearms Act. To use this barrel on a rifle without an NFA Short-Barreled Rifle (SBR) tax stamp, a muzzle device must be permanently pinned and welded to bring the overall barrel length to at least 16". Many builders add a pinned and welded flash hider to achieve compliance. Always consult a qualified gunsmith and ensure you understand all applicable federal and local regulations before completing your build.
