AR-15 Barrels | High-Quality AR-15 Barrels for Custom Builds
Custom AR-15 Barrels
Upgrade your rifle with premium AR-15 barrels from Moriarti Armaments. Whether you're building a new AR-15 or replacing a worn barrel, we offer precision-machined barrels in today's most popular calibers, including 5.56 NATO, .223 Wylde, 300 Blackout, 6.5 Grendel, 6.8 SPC, 7.62x39, .350 Legend, .450 Bushmaster, .50 Beowulf, .338 ARC, and .277 SIG Fury. Choose from a variety of barrel lengths, profiles, gas system configurations, and finishes to match your build. Designed for reliability, accuracy, and long service life, our AR-15 barrels are built to perform in hunting, competition, recreational, and tactical applications.
What barrel length is best for an AR-15?
The ideal AR-15 barrel length depends on your intended use. 10.5" to 12.5" barrels are popular for compact pistol builds, 14.5" to 16" barrels offer an excellent balance of maneuverability and velocity for general-purpose rifles, while 18" to 24" barrels are often preferred for precision shooting and hunting. The best choice depends on your caliber, application, and applicable federal, state, and local laws.
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AR-15 5.56 NATO 5'' Pistol Length Barrel 1:5 5R Twist Nitride and Micro Gas Tube
Specifications:Length: 5" Pistol5.56 NATO1:5 5R Twist.750" gas block diameterProprietary Micro ..
AR-15 5.56 NATO 5” Micro-Length Barrel – 1:5 Twist, Medium Profile, QPQ Finish | Moriarti Armaments
Engineered for maximum compactness and velocity in a micro-platform, the Moriarti 5” 5.56 NATO barre..
AR-15 5.56 NATO 6” Micro-Length Barrel – 1:7 Twist, Medium Profile, QPQ Finish | Moriarti Armaments
Enhance your compact AR-15 build with the Moriarti Arms 5.56 NATO 6" Micro Gas QPQ Barrel—engineered..
AR-15 Set - Moriarti AR15 5.56 NATO M4 Carbine Barrel with Free M4 Upper Receiver - Stripped
Enhance your AR-15 with the AR-15 Set - AR15 5.56 NATO M4 Carbine Barrel with Free M4 Upper Receiver..
CMMG 5.7x28mm 5" Barrel & BCG Kit | Radial Delayed Blowback
The CMMG 5.7x28mm 5" Barrel and BCG Kit provides a compact barrel-and-bolt system for compatible AR-..
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450 Bushmaster 16" AR-15 Heavy Barrel | Black Nitride | 1:24 Twist
Build a powerful big-bore AR with this 16" .450 Bushmaster barrel, engineered for dependable perform..
AR-15 .224 Valkyrie 20" VALKYRIE MEDIUM RIFLE LENGTH 1/7 BARREL - 4150 CMV
AR-15 .224 Valkyrie 20" VALKYRIE MEDIUM RIFLE LENGTH 1/7 BARREL - 4150 CMVLENGTH: 20"PROFILE: MEDIUM..
AR-15 .338 ARC 10.5" Pistol Barrel | 1:5 Twist | Pistol Gas | 5/8-24
Build a compact .338 ARC AR-15 around the Moriarti 10.5" .338 ARC Pistol Barrel. Featuring a fast 1:..
AR-15 .338 ARC 12.5" Pistol Barrel | 1:8 Twist | Pistol Gas | 5/8-24
Build a compact .338 ARC AR-15 with the Moriarti 12.5" .338 ARC Pistol Barrel, featuring a 1:8 twist..
AR-15 .338 ARC 16" Rifle Barrel | 1:8 Twist | Pistol Gas | 5/8-24
Build a rifle-length .338 ARC AR-15 around the Moriarti 16" .338 ARC Barrel, featuring a 1:8 twist r..
AR-15 .338 ARC 7.5" Pistol Barrel | 1:5 Twist | 5/8-24 | Black Nitride
Build an ultra-compact .338 ARC AR-15 around the Moriarti 7.5" .338 ARC Pistol Barrel. Featuring an ..
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AR-15 .350 Legend 20" 416R Stainless Steel Heavy Barrel - 1:16 Twist, Carbine Length Gas System
Unlock superior performance with the AR-15 .350 Legend 20" barrel crafted from 416R stainless steel...
AR-15 .400 Legend 16" Barrel | 1:16 Twist | Carbine Gas
Configure a .400 Legend AR-15 rifle around this 16" .400 Legend barrel, manufactured from durable 41..
AR-15 .400 Legend 18" Barrel | 1:16 Twist | Carbine Gas
Built for a longer .400 Legend AR-15 rifle configuration, this 18" .400 Legend barrel combines a med..
AR-15 12.7x42 18" Parkerized Heavy Barrel | 1:20 Twist | Mid-Length Gas System
Experience top-tier precision and durability with the AR-15 12.7x42 18" barrel. Made from 4150 Chrom..
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AR-15 12.7x42 50B 16" Parkerized Heavy Barrel, 1:20 Twist, Carbine
Elevate your AR-15 build with the 12.7x42 16" heavy barrel, designed for precision, durability, and ..
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AR-15 300 AAC Blackout 10.5" 4150 CMV Barrel, 1-7 twist, Govt Profile, Nitride
MADE FROM 4150 CMV AND HARDENED TO 26-32 RC AND STRESS RELIEVED, PLATED BLACK. 1-7 RH TWIST ..
AR-15 300 BLACKOUT 16" DIAMOND FLUTED STAINLESS STEEL BARREL, CARBINE, 1-7
AR-15 300 BLACKOUT 16" DIAMOND FLUTED STAINLESS STEEL BARREL 1-7. Made from 416 stainless steel har..
AR-15 300 Blackout 16" stainless steel spiral fluted barrel , 1-7 , carbine
AR-15 300 Blackout 16" stainless steel spiral fluted barrel 1-7 twist. MADE FROM 416R STAINLESS STEE..
AR-15 300 Blackout 16" Stainless Steel Straight Fluted Barrel - 1:7 Twist, Carbine Gas System
Enhance your AR-15 build with the 300 Blackout 16" stainless steel barrel, designed for superior per..
AR-15 300 Blackout 6" Barrel / 4150 CMV / Med Profile / Nitride
AR-15 300 Blackout 6" Barrel / 4150 CMV / Med Profile / Nitride6" MED PROFILE 1:7 TWIST4150 CMVNITRI..
AR-15 300 Blackout 9" HEAVY BARREL; 4150 CMV 1:7 TWIST
AR-15 300 Blackout 9" HEAVY BARREL; 4150 CMV 1:7 TWIST 9" HEAVY CONTOUR WITH 1:7 TWIST4150 CMV S..
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AR-15 5.56 NATO 11.5" 4150 CMV Nitride Barrel | Carbine-Length Gas System, 1/2x28 Thread
Enhance your AR-15 build with this high-performance AR-15 5.56 NATO 11.5" barrel. Crafted from 4150 ..
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AR-15 5.56 NATO 12.5" Carbine Barrel | M4 Profile, 1:8 Twist, Nitride Finish
The AR-15 5.56 NATO 12.5" Carbine Barrel is designed for shooters seeking a compact, reliable barrel..