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The 13.7-inch length sits right where compact handling meets realistic terminal ballistics. Long enough to extract full performance from 5.56 ammo, short enough to fit in tight spaces without feeling unwieldy. This particular configuration has become incredibly popular over the past few years because it hits a sweet spot: pair it with a muzzle device and you've got a complete rifle without unnecessary bulk.
Machined from 4150 Chrome Moly Vanadium steel with a salt bath nitrided finish, this barrel resists corrosion and fouling far better than standard mil-spec coatings. The finish goes deep into the bore and muzzle threads, providing protection where it matters most. The Government profile gives you a stiffer, more durable barrel while keeping weight reasonable at 25 ounces.
That mid-length gas system is where this barrel shines. Compared to carbine-length systems, you get longer dwell time, softer recoil impulse, and more predictable cycling. You'll shoot flatter, faster follow-ups will be easier, and the gun just feels less punchy. The 1:7 twist is designed to stabilize heavier projectiles, so you're not locked into light target rounds. The .750" gas block journal is standard and takes any normal low-profile or standard gas block.
Government contours have been the standard for AR barrels since the platform's inception. There's a reason: they work, they're proven, and they're durable. This one comes with QPQ-coated M4 feed ramps, meaning your ammo will feed reliably regardless of magazine wear or finish variation. The 1/2 x 28 muzzle threads accept suppressors, flash hiders, muzzle brakes, or whatever you need. Every Ballistic Advantage barrel carries a sub-MOA guarantee with match-grade ammunition and is pressure-tested and magnetic particle inspected before it ships.
Yes, but your final configuration matters. The 13.7" length is popular for pin-and-weld builds where you permanently attach a muzzle device to reach 16 inches overall length. You can also build it as a pistol-length AR with this barrel, but check applicable regulations. Either way, it's a standard Government profile AR-15 barrel that takes any normal upper receiver.
The 1:7 twist is optimized for heavier, match-grade projectiles, typically in the 77 to 90-grain range. It'll still stabilize standard 55-grain rounds just fine, but it excels with heavier bullets. This makes it versatile for anything from training to precision work to duty applications.
Mid-length provides longer dwell time and a softer recoil impulse than carbine-length systems. You'll notice smoother shooting, easier follow-up shots, and more predictable reliability. It's the sweet spot for most shooters, combining the maneuverability of a short barrel with the performance and ergonomics of a longer gas system.
Ballistic Advantage backs every Modern Series barrel with a sub-MOA accuracy guarantee when used with match-grade ammunition. All barrels are pressure-tested and magnetic particle inspected before shipping to ensure quality and safety.
| UPC | 819747020253 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BABL556033M |
| Color | Black |
| Barrel Length | 13.7" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Model | |
| Product Type | Barrel |
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