Wilson Combat 300 Aac Blackout 1-7 Twist 11.3'' Barrel

The Wilson Combat 300 AAC Blackout 1-7 twist 11.3" barrel is a purpose-built component for AR-15 short-barreled rifle builds optimized around one of modern shooting's most versatile intermediate cartridges. If you're assembling an NFA-registered SBR, this barrel delivers the compact footprint and precision engineering Wilson Combat is known for, with a twist rate specifically chosen to stabilize a wide range of .300 Blackout loads—from supersonic to subsonic ammunition. The 11.3" length positions this barrel in the sweet spot for sound suppressor integration and handy close-quarters handling without sacrificing ballistic performance.

Built from 416R stainless steel, this barrel features M4-style feed ramps and comes threaded 5/8x24 at the muzzle, the industry standard for .300 Blackout suppressors. The .750-inch gas journal accommodates a broad selection of aftermarket gas blocks, giving you flexibility in your build. A standard pistol-length gas system keeps your platform reliable and compatible with common AR components. Wilson Combat barrels are machined to tight tolerances and demand the same precision and craftsmanship you'd expect from a complete rifle—not surprising from a company with serious competition and duty-gun heritage.

This is a component, not a complete firearm. Building a short-barreled rifle requires registering your lower receiver with the ATF on a Form 1 before assembly—a critical legal step. Once registered, you have a compact, suppressor-ready platform ideal for home defense, short-range hunting, or serious close-quarters work. The 1-7 twist is engineered to stabilize heavier subsonic rounds that define the cartridge's appeal, making this barrel a natural choice if you plan to run suppressed.

Key Features

• 416R stainless steel construction for durability and corrosion resistance
• 1-7 twist rate optimized for .300 Blackout across supersonic and subsonic loads
• 11.3" barrel length: compact profile suited for suppressor use and SBR platforms
• M4-style feed ramps ensure reliable feeding
• 5/8x24 muzzle threads compatible with standard .300 Blackout suppressors
• .750" gas journal accepts a wide range of aftermarket gas blocks
• Pistol-length gas system for standard AR-15 compatibility

Specifications

Frequently Asked Questions

Is this barrel compatible with standard AR-15 parts?

Yes. The pistol-length gas system and .750" gas journal work with a broad range of aftermarket AR components, and the 5/8x24 muzzle thread is the standard for .300 Blackout suppressors.

What twist rate is best for .300 Blackout subsonic ammo?

The 1-7 twist is specifically designed to stabilize .300 Blackout across the full spectrum—both supersonic and subsonic loads. This makes it an excellent choice if you plan to run suppressed with heavier, slower bullets.

Do I need an NFA tax stamp and Form 1 to use this barrel?

Yes. This barrel is intended for NFA-registered short-barreled rifles. You must file and receive approval on a Form 1 with the ATF before registering an SBR lower receiver and assembling your rifle.

What suppressor thread pattern does this barrel use?

The muzzle is threaded 5/8x24, the standard thread pitch for .300 Blackout suppressors and muzzle devices.