AR-15 Upper Assemblies
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Moriarti's AR-15 Upper Assemblies for Custom Builds & Upgrades
Discover AR-15 upper assemblies from Moriarti Armaments, built for shooters seeking quality, reliability, and performance. Our collection includes complete and stripped upper assemblies in popular calibers such as 5.56 NATO, .223 Wylde, 300 AAC Blackout, 7.62x39, 6MM ARC, 6.5 Grendel, .350 Legend, .450 Bushmaster, .50 Beowulf, .22 LR, and more. Choose from a variety of barrel lengths, handguard styles, muzzle devices, and finishes to build or upgrade your AR-15. Whether you're looking for a compact pistol upper, a carbine configuration, or a full-size rifle upper, Moriarti Armaments offers options compatible with most standard mil-spec AR-15 lower receivers.
How do I know which AR-15 upper assembly is compatible with my lower receiver?
Most standard AR-15 upper assemblies are designed around the common AR-15 receiver pattern, but compatibility depends on more than the receiver itself. Check the caliber, bolt carrier group, magazine requirements, buffer system, gas system, and any caliber-specific components listed for the upper. Some AR-15 calibers can use a standard lower receiver while requiring different magazines, bolts, or other components. Always verify the specifications of the upper and your existing firearm components before purchasing.
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AR-15 300 Blackout 7.5" Patriotic Upper Assembly / Red Accents / Charging Handle / Shroud
Show your pride and embrace the power of precision with the AR-15 300 Blackout 7.5" Patriotic Upper ..
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AR-15 300 Blackout 7.5" Pistol Shark Upper Assembly /Mlok
AR-15 300 Blackout 7.5" Pistol Shark Upper Assembly /Mlok Features:1. Barrel: The AR-15 300 Blackout..
-228x228.webp "AR-15 5.56/.223 WYLDE 18\" MID BLACK WOLF UPPER ASSEMBLY / MLOK")
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AR-15 5.56/.223 WYLDE 18" MID BLACK WOLF UPPER ASSEMBLY / MLOK
Elevate your AR-15 with the Moriarti Arms 18" Mid Black Wolf Upper Assembly chambered in .223 Wylde,..
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AR-15 7.5" Cookie Cutter Upper Assembly / M-LOK | Choose Caliber: 5.56, 300 Blackout, 7.62x39
AR-15 7.5" Cookie Cutter Upper Assembly / M-LOK | Choose Caliber: 5.56, 300 Blackout, 7.62x39 | Prem..
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Moriarti AR-15 400 Legend 16" Tactical Upper – 4150 CMV Nitride, M-LOK Rail, Barrel Shroud
Upgrade your AR-15 with the Moriarti 400 Legend 16" Tactical Upper Assembly, engineered for power, p..
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Moriarti AR-47 7.62x39 10.5" Upper Assembly – Nitro-Met, Quadrail, Socom Muzzle Brake
Enhance your AR-15 build with the 7.62x39 10.5" Nitro-Met Quad Upper Assembly, designed for shooters..
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AR-15 .223/5.56 12.5" Pistol Upper Assembly | M-LOK Handguard | Anodized Black | Upgrade Your AR
Upgrade your AR-15 with the AR-15 .223/5.56 12.5" Pistol Upper Assembly featuring a 12" M-LOK Slim P..
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AR-15 300 AAC blackout 10.5" nitride classic mlok upper assembly / A2
AR-15 300 AAC blackout 10.5" classic mlok upper assembly is a perfect addition to your AR pistol. No..
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AR-15 300 AAC Blackout 10.5" Pistol Upper Assembly | Flash Cone
AR-15 300 AAC Blackout 10.5" Pistol Upper Assembly | Flash Cone | Precision PerformanceUpgrade your ..
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AR-15 300 Blackout 10.5" Diamond Cut 10" M-LOK Upper Assembly / Slanted Muzzle / 1x7 Twist – Sniper Grey Cerakote Finish
Unlock superior performance and style with the AR-15 300 Blackout 10.5" Diamond Cut 10" M-LOK U..
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AR-15 300 BLK 10.5" Walking Dead pistol upper assembly / Mlok
AR-15 300 BLK 10.5" Walking Dead Pistol Upper Assembly | MLOK | Custom CompensatorIncludes:Premium B..
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AR-15 5.56/.223 10.5" Nitro-Met Quad Upper Assembly with Red Socom Style Brake
AR-15 5.56/.223 10.5" Nitro-Met Quad Upper Assembly with Red Socom Style BrakeElevate your AR-15 bui..
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AR-15 5.56/.223 10.5" Nitro-Met Quad Upper Assembly with Socom Style Brake
AR-15 5.56/.223 10.5" Nitro-Met Quad Upper Assembly with SOCOM Style Muzzle BrakeUpgrade your AR-15 ..
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AR-15 6.5 Grendel 12.5" Ballistic Premium Pistol Upper - Enhanced Performance and Precision
Upgrade your AR-15 with the 6.5 Grendel 12.5" Ballistic Premium Pistol Upper, a high-performance upp..
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AR-15 Custom 6.5 Grendel 12.5" Upper Assembly | Hunting & Tactical AR-15 Build | M-LOK | Triport
Enhance your AR-15 build with this Custom 6.5 Grendel 12.5" Upper Assembly, designed for tactical pe..
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Moriarti AR-15 .338 ARC 16" Upper Assembly | 12" M-LOK | A2 Flash Hider
Step up your AR game with the Moriarti AR-15 .338 ARC 16" Upper Assembly, built for enhanced energy ..
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Moriarti AR-15 300 Blackout 10.5" Pistol Upper Assembly | 10" OD Green M-LOK | A2 Flash Hider
Moriarti AR-15 300 Blackout 10.5" Pistol Upper Assembly | 10" OD Green M-LOK | A2 Flash Hider | USA-..
-228x228.webp "Moriarti AR-15 300 Blackout 10.5\" Pistol Upper Assembly | MLOK | Shroud")
-228x228.webp "Moriarti AR-15 300 Blackout 10.5\" Pistol Upper Assembly | MLOK | Shroud")
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Moriarti AR-15 300 Blackout 10.5" Pistol Upper Assembly | MLOK | Shroud
Moriarti AR-15 300 Blackout 10.5" Pistol Upper Assembly | MLOK | Shroud | Precision EngineeringThe M..
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Moriarti AR-15 300 Blackout 10.5" Quad Upper – Nitro-Met with Socom Style Brake
Experience unparalleled shooting performance with the Moriarti AR-15 300 AAC Blackout 10.5" Upper As..
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AR-15 .350 Legend 20" Stainless Steel Tactical Upper Assembly | Mlok | A2 Flash Hider
Unlock the full potential of your AR-15 with the Moriarti Armaments .350 Legend 20" Stainless Steel ..
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AR-15 .450 Bushmaster 20" Black Nitride Upper Assembly with MLOK | Big Bore Performance
The AR-15 .450 Bushmaster 20" Black Nitride Upper Assembly is designed for big bore performance, off..
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AR-15 5.56/.223 10.5" Slim Nitride Upper Assembly | Cerakote Finish | Choose Your Color
AR-15 5.56/.223 10.5" Slim Nitride Upper Assembly | Cerakote Finish | Choose Your ColorUpgrade your ..
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AR-15 6.5 Grendel 16" Tactical Upper with 15" M-Lok Handguard and Thread Protector - Precision, Power, and Durability
AR-15 6.5 Grendel 16" Tactical Upper with 15" M-Lok Handguard - Precision, Power, and DurabilityUpgr..
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AR-15 6.5 Grendel 18" Nitride Upper Assembly with Slim M-Lok Rail - Precision Performance for Tactical & Long-Range Shooting
Enhance your AR-15 with the 6.5 Grendel 18" Nitride Upper Assembly, built for precision, power, and ..
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Moriarti AR-15 5.56 10.5" Diamond Cut 10" MLOK Upper Assembly / Triport / Black
Upgrade your AR-15 build with the Moriarti Armaments 5.56 NATO 10.5" Diamond Cut M-LOK Upper Assembl..
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AR-15 5.56/.223 13.9" Carbine Upper Assembly w/ 7" Fake Suppressor
Upgrade your AR-15 with the 13.9" Carbine Upper Assembly, featuring a sleek pencil profile barrel an..
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AR-15 6.5 Grendel 16" Carbine Upper Assembly | 15" M-Lok Handguard | Custom Cerakote Gradient Colors | 1:8 Twist | 5/8x24 Thread
Upgrade your AR-15 with the Moriarti Armaments 6.5 Grendel 16" Carbine Upper Assembly, offering powe..
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AR-15 6.5 Grendel Type II 16" Tactical Upper Assembly – M-LOK Handguard, 4150 CMV Barrel, Shark Muzzle
Moriarti Armament's AR-15 16" 6.5 Grendel Type II Tactical Upper Assembly – M-LOK Handguard, 41..
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AR-15 6.5 Grendel 18" Stainless Upper Assembly | M-LOK Handguard | Mid-Length Gas System
Take your shooting game to the next level with the AR-15 6.5 Grendel 18" Stainless Steel Upper Assem..
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AR-15 6.5 Grendel 20" Diamond Fluted Stainless Upper Assembly | M-LOK | Triport
Enhance your AR-15 build with the AR-15 6.5 Grendel 20" Diamond Fluted Stainless Steel Upper Assembl..
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AR-15 6.5 Grendel 20" Spiral Fluted Stainless Steel Upper Assembly | 15" M-LOK Handguard
Upgrade your AR-15 with this custom 6.5 Grendel 20" Spiral Fluted Stainless Steel Upper Assembly, de..
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AR-15 6.5 Grendel 20" Stainless Straight Fluted Competition Upper Assembly | M-LOK Handguard
Take your precision shooting to new heights with the AR-15 6.5 Grendel 20" Stainless Steel Straight ..
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AR-15 6.5 Grendel 22" Heavy Barrel Upper | Rifle Length Gas | M-LOK
Upgrade your AR-15 with this 6.5 Grendel 22" heavy barrel upper assembly, designed for precision sho..
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AR-15 6.5 Grendel 24" Competition Upper Assembly | Nitride Barrel | M-LOK | Tanker Muzzle Brake
Transform your AR-15 into a 6.5 Grendel with this 24" competition upper assembly. Designed for high-..
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AR-15 5.56 NATO 10.5" Upper Assembly in OD Green with Mlok Handguard and Shroud – Moriarti Arms
Built for performance and style, the MORIARTI AR-15 5.56 NATO 10.5" MLOK Upper Assembly in OD Green ..
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AR-15 5.56/.223 10.5" Mlok Upper Assembly / Green Accents
AR-15 5.56/.223 10.5" Mlok Upper Assembly / Green Accents Features:Chamber - 5.56/.223 WYLDEBar..
AR-15 .450 Bushmaster 7.5" Pistol Upper Assembly / Mlok Free Float
AR-15 .450 Bushmaster 7.5" Pistol Upper Assembly / Mlok Free Float – Compact, Powerful, and Ready fo..
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AR-15 5.56/.223 16" Bull Upper Assembly / 15" MLOK Rail / Black
Elevate your shooting experience with the AR-15 5.56/.223 16" Bull Upper Assembly, featuring a preci..
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AR-15 5.56/.223 20" Stainless Tactical Bull Upper Assembly | M-LOK | Straight Fluted
Upgrade your AR-15 with the 20" Stainless Tactical Bull Upper Assembly, designed for superior accura..
AR-15 5.56/.223 24" Black Diamond Fluted M-LOK Upper Assembly / Mlok / Tri
Upgrade your AR-15 with this 24" Black Diamond Fluted M-LOK Upper Assembly / Mlok / Tri, designed fo..
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AR-15 5.56/.223 24" Stainless Steel Diamond Fluted Bull Upper Assembly / Mlok
Upgrade your AR-15 build with this premium 24-inch AR-15 upper assembly designed for precision, accu..
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AR-15 9" .22LR Dedicated Upper Assembly | 9" Barrel | 10" M-LOK Rail | Linear Comp | BCG & Charging Handle
Enhance your AR-15 platform with our precision-engineered 9" .22LR Dedicated Upper Assembly, perfect..
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Moriarti AR-15 400 Legend 7.5" Pistol Upper – Flash Cone Muzzle, 10" M-LOK, Made in USA
Unleash short-barrel stopping power with the Moriarti AR-15 7.5" 400 Legend Pistol Upper Assembly, e..
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AR-15 .224 Valkyrie 20" Diamond Fluted Stainless Steel Upper Assembly | Mlok | Match Grade 416R Barrel
The Moriarti Armaments AR-15 .224 Valkyrie 20" Diamond Fluted Stainless Steel Upper Assembly is a pr..
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AR-15 .224 Valkyrie 20" Straight Fluted Stainless Steel Upper Assembly / M-LOK - Match Grade Barrel, Triport Muzzle Brake
The AR-15 .224 Valkyrie 20" Straight Fluted Stainless Steel Upper Assembly is an excellent upgrade f..
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AR-15 .224 Valkyrie 20″ Spiral Stainless Steel Upper Assembly / Mlok
The Moriarti Armaments AR-15 .224 Valkyrie 20″ spiral fluted stainless steel upper assembl..
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AR-15 .458 Socom 18" 4150 CMV Upper Assembly / 15" Mlok
AR-15 .458 Socom 18" 4150 CMV Upper Assembly / 15" Mlok . This upper assembly is com..
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AR-15 12.7x42 7.5" Pistol Upper Assembly / Mlok Free Float
AR-15 12.7x42 7.5" Pistol Upper Assembly / Mlok Free Float - This assembly includes 7" heavy pr..
AR-15 16" 5.56/.223 Blue Diamond Modular Bull Upper Assembly | 10" Mlok
Features:Barrel: 16" 416 stainless steel bull contour barrel with diamond fluting, blue coated with ..
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AR-15 5.56/.223 10.5" 'Walking Dead' Pistol Upper Assembly
Features:Barrel - 10.5" 4150 govt profile barrel. Hardened to 26-32 rc and stress relieved. Ch..