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The 300 Blackout was made for short barrels, and this 10-inch Ballistic Advantage Modern Series barrel is right in the sweet spot. It runs a pistol-length gas system, which is what you want on a short .300 BLK to keep cycling smooth whether you're shooting supersonic loads bare or running heavy subsonics through a can. Chambered in .300 AAC Blackout, it works with standard AR-15 mags and a standard bolt carrier group, so building an upper is about as straightforward as it gets.
This one is cut from 4150 Chrome Moly Vanadium steel and finished with the Quench-Polish-Quench (QPQ) process. That nitride treatment fights corrosion and adds a natural lubricity that helps the barrel wear well over a long life. The M4 feed ramp extension gets its own QPQ coating too, which keeps feeding reliable across different bullet weights and helps the barrel hold its torque values over time.
The 1:7 twist is the right call for .300 Blackout, spinning up heavier projectiles and stabilizing the whole range from around 100-grain pills to 220-grain and heavier subsonics. The muzzle wears 5/8-24 threads, standard for .30-caliber muzzle devices and suppressors, which matters since this round was designed with quiet shooting in mind. It's built on Ballistic Advantage's DRP (Distinct Rigid Pattern) profile, a stouter contour with a bit more wall thickness to dissipate heat and cut down on barrel whip in a short package.
Folks running this barrel report tight groups, with plenty of setups printing well under an inch at 50 to 100 yards using quality subsonic and supersonic ammo. It ships backed by the BA sub-MOA accuracy guarantee with match-grade ammunition. If you're putting together a compact AR pistol or an SBR and want a barrel that punches above its weight, this is a solid pick that a lot of builders keep coming back to.
It's set up with a pistol-length gas system, which is ideal for a short .300 Blackout barrel. That setup keeps cycling reliable across supersonic and subsonic loads and works especially well when you're running a suppressor.
Yes. The 1:7 twist is designed to spin up heavier .30-caliber projectiles, so it handles everything from lighter supersonics around 100 grains up to 220-grain and heavier subsonic bullets. That versatility is a big part of why the 300 Blackout is so popular in short barrels.
It is. The muzzle comes with standard 5/8-24 threads, which fit common .30-caliber muzzle devices and suppressors. Since .300 Blackout was developed with suppressed shooting in mind, this pairs naturally with a can for quiet subsonic use.
Ballistic Advantage backs it with a sub-MOA guarantee when paired with match-grade ammunition. Builders regularly report groups well under an inch at 50 to 100 yards with quality subsonic and supersonic ammo, so it delivers plenty of precision for a compact build.
| UPC | 819747022028 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | BABL300006M |
| Barrel Length | 10" |
| Caliber/Gauge | .300 AAC Blackout |
| Color | Black |
| Length | 10'' |
| Model | |
| Product Type | Barrel |
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