.300 Blackout Barrels | Aerospace Arms

Explore our extensive range of 300 Blackout / Whisper barrels, ideal for building a suppressed rifle that combines power with stealth. Whether you're setting up for subsonic or supersonic performance, these barrels are engineered to maximize the potential of your 300 BLK build. Perfect for those who value versatility and suppression, our barrels deliver superior accuracy and reliability, making them a must-have for any serious shooter looking to create a whisper-quiet setup that others will envy.

Faxon Firearms

Faxon Match Series 6" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol-Length, 416R, QPQ Nitride, 5R, Nickel Teflon Extension

Retail: $185.00

Was:

Now: $175.75

Add to Cart
Faxon Firearms

Faxon Match Series 7.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol-Length, 416R, QPQ Nitride, 5R, Nickel Teflon Extension

Retail: $185.00

Was:

Now: $175.75

Currently out of stock, check back later
Ballistic Advantage

Ballistic Advantage, Modern Series, Barrel, 300 Blackout, 14.5", Pistol Length Gas System, Fits AR15, QPQ Finish, Black

Retail: $175.00

Was:

Now: $166.25

Currently out of stock, check back later
Faxon Firearms

Faxon Firearms 10.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Mid-Length 4150 QPQ, Pinned Gas Block

Retail: $225.00

Was:

Now: $213.75

Add to Cart
Ballistic Advantage

Ballistic Advantage, Performance Series, Hanson Profile Barrel, 300BLK, 8.3", Black Finish, Lo Pro Gas Block Included

Retail: $210.00

Was:

Now: $199.50

Add to Cart
Ballistic Advantage

Ballistic Advantage, Modern Series, Distinct Rigid Pattern Barrel, 300 Blackout, 8" 1:7 Twist

Retail: $155.00

Was:

Now: $147.25

Add to Cart
Ballistic Advantage

Ballistic Advantage, Modern Series, 10" Distinct Rigid Pattern Barrel, 300 Blackout

Retail: $165.00

Was:

Now: $156.95

Add to Cart
Faxon Firearms

Faxon Match Series- 10.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol Length, 416R, QPQ, 5R, NP3 Extension

Retail: $195.00

Was:

Now: $185.25

Currently out of stock, check back later
Faxon Firearms

Faxon Match Series- 9" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol Length, 416R, QPQ, 5R, NP3 Extension

Retail: $185.00

Was:

Now: $175.75

Add to Cart
Faxon Firearms

Faxon Firearms 7.5" GUNNER Light Hybrid, 300 BLK, Pistol-Length, 4150 QPQ

Retail: $150.00

Was:

Now: $142.50

Add to Cart
Faxon Firearms

Faxon Firearms 16" GUNNER Light Hybrid, 300 BLK, Carbine-Length, 4150 QPQ

Retail: $174.00

Was:

Now: $165.30

Add to Cart
CMMG

CMMG, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 416 SS Bead Blasted Finish, 5/8"-24 TPI

Retail: $199.95

Was:

Now: $189.95

Add to Cart
CMMG

CMMG 16.1" 300BLK Barrel, Carbine Length, 1:7 Twist, 4140 CM Salt Bath Nitride Finish

Retail: $189.95

Was:

Now: $179.95

Add to Cart
Faxon Firearms

Faxon Firearms 10.5" GUNNER Light Hybrid, 300 BLK, Pistol-Length, 4150 QPQ

Retail: $160.00

Was:

Now: $152.00

Currently out of stock, check back later

Faxon Firearms

Faxon Match Series 6" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol-Length, 416R, QPQ Nitride, 5R, Nickel Teflon Extension

A faster 1:5 Twist Rate combined with the Lightweight Faxon Gunner Profile. The 300 Blackout cartridge yields increased performance in shorter barrels and effective subsonic performance. By speeding up the twist rate to 1:5 from common 300 BLK rates of...

Retail: $185.00

Was:

Now: $175.75

Add to Cart
Faxon Firearms

Faxon Match Series 7.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol-Length, 416R, QPQ Nitride, 5R, Nickel Teflon Extension

A faster 1:5 Twist Rate combined with the Lightweight Faxon Gunner Profile. The 300 Blackout cartridge yields increased performance in shorter barrels and effective subsonic performance. By speeding up the twist rate to 1:5 from common 300 BLK rates of...

Retail: $185.00

Was:

Now: $175.75

Currently out of stock, check back later
Ballistic Advantage

Ballistic Advantage, Modern Series, Barrel, 300 Blackout, 14.5", Pistol Length Gas System, Fits AR15, QPQ Finish, Black

This .300 Blackout chambered 14.5 inch Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. Features and Specifications: Length: 14.5" Material: 4150 Chrome...

Retail: $175.00

Was:

Now: $166.25

Currently out of stock, check back later
Faxon Firearms

Faxon Firearms 10.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Mid-Length 4150 QPQ, Pinned Gas Block

If you're looking for a more robust mounting method for your gas block... look no further. Pinning your gas block, in addition to the use of set screws, gives the user the extra piece of mind that your gas block won't shift or loosen while firing. We...

Retail: $225.00

Was:

Now: $213.75

Add to Cart
Ballistic Advantage

Ballistic Advantage, Performance Series, Hanson Profile Barrel, 300BLK, 8.3", Black Finish, Lo Pro Gas Block Included

At Ballistic Advantage they produce quality AR barrels that exceed the most enduring demands of their customers. All of their AR barrels surpass the competition in accuracy, precision, and beautifully contoured aesthetics. BA's engaged team of engineers...

Retail: $210.00

Was:

Now: $199.50

Add to Cart
Ballistic Advantage

Ballistic Advantage, Modern Series, Distinct Rigid Pattern Barrel, 300 Blackout, 8" 1:7 Twist

At Ballistic Advantage they produce quality AR barrels that exceed the most enduring demands of their customers. All of their AR barrels surpass the competition in accuracy, precision, and beautifully contoured aesthetics. BA's engaged team of engineers...

Retail: $155.00

Was:

Now: $147.25

Add to Cart
Ballistic Advantage

Ballistic Advantage, Modern Series, 10" Distinct Rigid Pattern Barrel, 300 Blackout

At Ballistic Advantage they produce quality AR barrels that exceed the most enduring demands of their customers. All of their AR barrels surpass the competition in accuracy, precision, and beautifully contoured aesthetics. BA's engaged team of engineers...

Retail: $165.00

Was:

Now: $156.95

Add to Cart
Faxon Firearms

Faxon Match Series- 10.5" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol Length, 416R, QPQ, 5R, NP3 Extension

The Gunner profile is a blend of two of the best performing profiles of all time, Gov't and Pencil. Proving that every once and awhile, the Government can do something right, the Gunner's profile from the extension to the gas block mimics that...

Retail: $195.00

Was:

Now: $185.25

Currently out of stock, check back later
Faxon Firearms

Faxon Match Series- 9" GUNNER Light Hybrid AR15 Barrel, 300 BLK, Pistol Length, 416R, QPQ, 5R, NP3 Extension

The Gunner profile is a blend of two of the best performing profiles of all time, Gov't and Pencil. The Gunner's profile from the extension to the gas block mimics that well-known taper. From there, innovation takes over and the Gunner moves to a ...

Retail: $185.00

Was:

Now: $175.75

Add to Cart
Faxon Firearms

Faxon Firearms 7.5" GUNNER Light Hybrid, 300 BLK, Pistol-Length, 4150 QPQ

Just what is the Gunner profile? The Gunner profile is a blend of two of the best performing profiles of all time, Gov't and Pencil. Proving that every once and awhile, the Government can do something right, the Gunner's profile from the...

Retail: $150.00

Was:

Now: $142.50

Add to Cart
Faxon Firearms

Faxon Firearms 16" GUNNER Light Hybrid, 300 BLK, Carbine-Length, 4150 QPQ

Just what is the GUNNER profile? The GUNNER (all caps, as it is that awesome) is the pinnacle of performance, weight, balance, and value. Designed by our competition shooting staff for those who value performance and versatility, the GUNNER profile is a...

Retail: $174.00

Was:

Now: $165.30

Add to Cart
CMMG

CMMG, 300 AAC Blackout, 16.1" Barrel, 1:7 Twist, Carbine 416 SS Bead Blasted Finish, 5/8"-24 TPI

Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced. Features and Specifications: 1:7 Twist 416 Stainless steel 5/8X24 thread pitch Medium taper...

Retail: $199.95

Was:

Now: $189.95

Add to Cart
CMMG

CMMG 16.1" 300BLK Barrel, Carbine Length, 1:7 Twist, 4140 CM Salt Bath Nitride Finish

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Features and Specifications: CALIBER: .300 BLK BARREL LENGTH: 16.1 BARREL TWIST: 1:7 BARREL...

Retail: $189.95

Was:

Now: $179.95

Add to Cart
Faxon Firearms

Faxon Firearms 10.5" GUNNER Light Hybrid, 300 BLK, Pistol-Length, 4150 QPQ

Just what is the GUNNER profile? The GUNNER (all caps, as it is that awesome) is the pinnacle of performance, weight, balance, and value. Designed by our competition shooting staff for those who value performance and versatility, the GUNNER profile is a...

Retail: $160.00

Was:

Now: $152.00

Currently out of stock, check back later