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The Ballistic Advantage Modern Series 13.9-inch Government Profile barrel delivers serious performance in a genuinely compact package. Built for AR builders who need maneuverability without sacrificing the reliability and dwell time benefits of a mid-length gas system, this barrel strikes the balance that makes short AR builds actually work.
Machined from 4150 Chrome Moly Vanadium steel, this barrel is finished with a QPQ corrosion-resistant coating that holds up against rust and environmental wear. The QPQ-coated M4 feed ramp extension ensures smooth, reliable chambering regardless of the ammunition type. At just under 14 inches, the compact length doesn't sacrifice the longer dwell time you get from mid-length gas systems, so you get softer recoil and better cycling consistency than you would with a carbine-length alternative.
The mid-length configuration gives you a longer dwell time compared to carbine-length systems, which means reduced bolt carrier group wear and noticeably softer felt recoil. This is especially valuable for suppressed builds or extended shooting sessions where shooter comfort matters. The 1:7 twist rate handles everything from 55-grain training rounds to heavier 62-77 grain loads like M855 and MK262, making the barrel genuinely versatile for both practice and duty applications.
The 1/2×28 threaded muzzle accepts suppressors, flash hiders, and muzzle brakes, giving you flexibility to configure the barrel for your specific needs. The 0.750-inch gas block journal supports standard mil-spec gas blocks and works seamlessly with adjustable options. This barrel fits all mil-spec AR-15 upper receivers, so integration into your build is straightforward. Real users report clean groups with match-grade ammunition and solid reliability across mixed ammunition types.
The 1:7 twist is optimized for 55-77 grain 5.56 NATO ammunition, including standard M855 (62gr) and heavier match loads like MK262 (77gr). It reliably stabilizes lighter 55-grain .223 Rem rounds as well, making it versatile for training, duty, and precision applications.
Mid-length gas systems provide a longer dwell time than carbine systems, resulting in smoother cycling, reduced bolt carrier group wear, and noticeably softer recoil. On a 13.9-inch barrel, this makes a real difference for reliability and shooter comfort, especially with suppressed builds or extended shooting sessions.
QPQ is a salt bath nitride process that creates a hard, corrosion-resistant surface coating. Unlike blued finishes, QPQ provides superior protection against rust and wear without requiring special maintenance. It's durable enough for tactical and duty use while staying low-maintenance.
This barrel has a standard 0.750-inch gas block journal, which is the most common size for AR-15 mid-length builds. Both fixed and adjustable gas blocks in standard 0.750-inch diameter will work perfectly. Make sure your gas block matches this journal size when assembling your upper.
| UPC | 819747020314 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BABL556035M |
| Barrel Length | 13.9" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Color | Black |
| Model | |
| Product Type | Barrel |
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