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Moriarti AR-15 .300 AAC Blackout Threaded Barrel Up to 72% Off w/ Free Shipping — 4 models

Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 7.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-7-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, Nitride, Black, MAR-300-5-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 16 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-16-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 14.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-14-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 7.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-7-BRL
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Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 7.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-7-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, Nitride, Black, MAR-300-5-BRL
2 of 4 images
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, Nitride, Black, MAR-300-5-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 16 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-16-BRL
3 of 4 images
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 16 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-16-BRL
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 14.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-14-BRL
4 of 4 images
Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 14.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-14-BRL

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Helpful Negative Review
Incorrect listing information by Sarcastic Ballistics, Verified Owner, March 21, 2026
Although this product says several times “pistol length gas system” it actually requires a micro length gas system. Product quality is good and the dimpled barrel makes installing the gas block easy. Just really annoying the product information in th...
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Product Info for Moriarti AR-15 .300 AAC Blackout Threaded Barrel

Upgrade your AR-15 build with the Moriarti Armaments 300 Blackout designed for precision shooting and reliable performance. Crafted from 4150 Chrome Moly Vanadium (CMV) steel, this barrel delivers exceptional durability and accuracy. With a micro gas system and QPQ corrosion-resistant finish, it's built to perform under tough conditions, making it an ideal choice for your 300 Blackout rifle setup.image

Whether you're building a compact rifle or AR-15 pistol, this barrel provides the perfect balance between reliability and power. Designed for those who demand high performance, the Moriarti 300 Blackout barrel ensures smooth operation and optimal cycling in your AR-15 platform.

WARNING: California`s Proposition 65

Specifications for Moriarti AR-15 .300 AAC Blackout Threaded Barrel:

Manufacturer: Moriarti
Color: Black
Fabric/Material: 4150 Chrome Moly Vanadium
Caliber: .300 AAC Blackout
Barrel Profile: Medium
Gas System Length: Micro
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-7
Gun Make: AR Platform
Gun Model: AR-15
Weight: 24 oz
Firearms Threads Per Inch: 5/8x24

Features of Moriarti AR-15 .300 AAC Blackout Threaded Barrel

  • Perfect for AR-15 pistol builds or short-barreled rifles (SBRs)
  • Designed for both subsonic and supersonic 300 Blackout ammo
  • Excellent corrosion resistance for all-weather reliability
  • Smooth cycling with micro gas system
  • Ideal for a tactical or hunting rifle setup

Package Contents:

  • Moriarti AR-15 .300 AAC Blackout Threaded Barrel

What firearm models does the manufacturer say Moriarti AR-15 .300 AAC Blackout Threaded Barrel is compatible with?

The manufacturer says that Moriarti AR-15 .300 AAC Blackout Threaded Barrel is compatible with AR-15

Moriarti AR-15 .300 AAC Blackout Threaded Barrel Orderable Models

List of Orderable Models

  • Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 7.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-7-BRL , MPN: MAR-300-7-BRL , UPC: 799787098644 , Code: 5MY-ATB-S4GE-MAR-300-7-BRL
  • Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, Nitride, Black, MAR-300-5-BRL , MPN: MAR-300-5-BRL , UPC: 799787098613 , Code: 5MY-ATB-S4GE-MAR-300-5-BRL
  • Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 16 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-16-BRL , MPN: MAR-300-16-BRL , UPC: 799787098620 , Code: 5MY-ATB-S4GE-MAR-300-16-BRL
  • Moriarti AR-15 .300 AAC Blackout Threaded Barrel, 14.5 inch, Medium, Micro Gas System, 1-7 Twist, 5/8x24, QPQ Corrosion Resistant, Black, MAR-300-14-BRL , MPN: MAR-300-14-BRL , UPC: 799787098637 , Code: 5MY-ATB-S4GE-MAR-300-14-BRL
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Last updated 2026-08-30 UTC.