AR-15 Upper Assemblies
-80x80.webp "AR 15 Upper Assemblies | Barreled Upper Assemblies For AR 15")
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.
Will these AR-15 upper assemblies fit my lower receiver?
Most AR-15 upper assemblies are designed to fit standard mil-spec AR-15 lower receivers. Always verify caliber compatibility and product specifications before purchasing.
Refine Search
-228x228.webp "AR-15 5.56/.223 8.5\" Fear Nothing Upper Assembly / Red Claw / Mlok")
-36%
AR-15 5.56/.223 8.5" Fear Nothing Upper Assembly / Red Claw / Mlok
AR-15 5.56/.223 8.5" Fear Nothing Upper Assembly / Red Claw / Mlok Includes: Barrel - 8.5..
-37%
AR-15 6.5 Grendel 10" Premium Pistol Upper – M-LOK, A2 Flash, and Super Slim Rail
Unleash the Power of the 6.5 Grendel with Our Premium AR-15 Pistol Upper. Designed for shooters who ..
-33%
AR-15 6.5 Grendel 10" Premium Upper Assembly | M-LOK Handguard | Nitride Finish | Available in FDE, OD Green, and Grey
Upgrade your AR-15 with the Moriarti Armaments 6.5 Grendel 10" Premium Upper Assembly—a high-perform..
-25%
AR-15 7.62X39 16" Carbine "CLAW" Upper Assembly | MLOK, Nitride Barrel, Muzzle Brake
Upgrade your AR-15 with the 7.62X39 16" Carbine "CLAW" Upper Assembly, offering a robust design idea..
-33%
AR-15 7.62x39 5" Pistol Hybrid Upper Assembly - Spitfire / MLOK Rail
The AR-15 7.62x39 5" Pistol Hybrid Upper Assembly with Spitfire Muzzle Brake and MLOK Rail is the pe..
-30%
AR-15 7.62×39 16" Diamond Stainless Steel Upper Assembly with M-LOK Rail
The AR-15 7.62×39 16" Diamond Stainless Steel Upper Assembly with M-LOK Rail delivers exceptional pe..
-42%
AR-15 7.62×39 16" Spiral Stainless Steel Upper Assembly / M-LOK
Moriarti Armaments offers a high-performance AR-15 upper chambered in 7.62x39, built around a 16" sp..
-38%
AR-15 7.62×39 16" Tactical Upper Assembly with 12" Slim Mlok and A2 Flash Hider
This AR-15 7.62x39 16" Tactical Upper Assembly is engineered for shooters looking to pair the reliab..
-25%
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..
-28%
AR-15 Complete 16" .22LR Pencil Upper Receiver | A2 | 12" M-LOK | BCG & Charging Handle
Upgrade your AR-15 with this lightweight and high-performance 16" .22LR Pencil Upper Receiver. Built..
-38%
AR-47 7.62x39 5" Cookie Cutter Upper Assembly / Mlok
Upgrade your rifle with the AR-47 7.62x39 5" Cookie Cutter Upper Assembly, featuring a Micro Length ..
-49%
AR-74 7.62x39 5" Micro Pistol Upper Assembly / Suppressor Ready – Moriarti Arms
The MORIARTI AR-74 7.62x39 5" Micro Pistol Upper Assembly delivers compact power and versatility for..
-43%
Micro 300 Blackout Upper – 5" AR-15 Pistol Assembly Suppressor Ready | Moriarti Armaments
The Moriarti Micro 300 Blackout Upper Assembly is designed for shooters looking for a compact, versa..
-44%
Moriarti AR-15 .338 ARC 10.5" Upper Assembly | M-LOK | A2 Flash Hider
Experience the superior performance of the Moriarti AR-15 .338 ARC 10.5" Upper Assembly, built for p..
-228x228.webp "Moriarti AR-15 10.5\" 5.56 NATO Pistol Upper Assembly – OD Green Mlok, A2 Flash Hider")
-33%
Moriarti AR-15 10.5" 5.56 NATO Pistol Upper Assembly – OD Green Mlok, A2 Flash Hider
Elevate your AR-15 pistol build with the Moriarti AR-15 5.56 NATO 10.5" Pistol Upper Assembly featur..
-40%
Moriarti AR-15 16" Complete Upper Assembly with Left Hand Side Charger - Choose Caliber
This AR-15 16” Tactical Upper Assembly is designed for left-handed shooters or anyone seeking a stre..
-40%
Moriarti AR-15 300 Blackout 10.5" Diamond Cut 10" Mlok Upper Assembly / Burnt Bronze
Elevate your AR-15 with the Moriarti Armaments 300 Blackout 10.5" Diamond Cut Upper Assembly, design..
-25%
Moriarti AR-15 300 Blackout 10.5" Diamond Cut Upper Assembly / Triport / Mlok / Black
Moriarti AR-15 300 Blackout 10.5" Diamond Cut Upper Assembly / Triport / Mlok / BlackManufacturer:Mo..
-27%
Moriarti AR-15 300 Blackout 14.5" Slim M-LOK Upper Assembly - 12" Free-Float Handguard / Thread Protector / 1X7 Twist
Elevate your AR-15 build with the Moriarti Armaments 300 Blackout 14.5" Slim M-LOK Upper Assembly, d..
-28%
MORIARTI AR-15 5.56 NATO 16" M4 CARBINE UPPER ASSEMBLY / 15" MLOK / TRI
MORIARTI AR-15 5.56 NATO 16 M4 Carbine Upper Assembly with a 15 MLOK rail and triport muzzle brake i..
-49%
MORIARTI AR-15 5.56 NATO 5" Micro Pistol Upper Assembly / Suppressor Ready
The MORIARTI AR-15 5.56 NATO 5" Pistol Upper Assembly is precision-engineered for superior performan..
-228x228.webp "Moriarti AR-15 5.56/.223 10.5\" M-LOK Upper Assembly – Red Shroud, Red Accents, Red Charging Handle")
-40%
Moriarti AR-15 5.56/.223 10.5" M-LOK Upper Assembly – Red Shroud, Red Accents, Red Charging Handle
Elevate your AR build with the AR-15 5.56/.223 10.5" M-LOK Upper Assembly featuring striking red acc..
-46%
MORIARTI AR-15 5.56/.223 16" M4 BARRETT STYLE UPPER ASSEMBLY / FDE
AR-15 5.56/.223 16" M4 Barrett Style Upper Assembly | FDE | CA & NY CompliantUpgrade your AR-15 ..
-38%
Moriarti AR-15 5.56/.223 16" Stainless Checkered Upper Assembly
The AR-15 5.56/.223 16 Stainless Checkered Upper Assembly - designed by Moriarti Armaments is a..
-30%
Moriarti AR-15 5.56/.223 16" ‘Black Canon’ Upper Assembly – 7" Faux Can, M-LOK Rail
Unleash unparalleled performance with the AR-15 5.56/.223 16" M4 "BLACK CANON" Upper Assembly from M..
-45%
MORIARTI AR-47 7.62X39 16" RED "PINEAPPLE" UPPER ASSEMBLY
Key Features:Action: Semi-AutoGas System: Carbine-Length Gas SystemChamber: 7.62x39Twist Rate: 1/10 ..
-36%
Moriarti Armaments AR-15 300 Blackout 5" Cookie Cutter Upper Assembly
Elevate your shooting experience with the Moriarti Armaments 300 Blackout 5" Cookie Cutter Upper Ass..
-27%
AR-15 .22 ARC 16" Faxon Gunner Upper Assembly w/ 15" M-LOK, CLAW Muzzle Device
The AR-15 .22 ARC 16" Faxon Gunner Upper Assembly brings the high-performance power of the .22-250 c..
-40%
AR-15 .223 Wylde 18" Stainless Upper Assembly / 15" M-LOK / BCG & CH
Upgrade your AR-15 with the Moriarti Arms 18" .223 Wylde Stainless Upper Assembly, designed for both..
-23%
AR-15 .223 Wylde 24" CMV Tactical Bull Upper Assembly, Left Handed Side Charger
AR-15 .223 Wylde CMV Tactical Bull Upper Assembly, Left Handed Side Charger. CA and NY complia..
-27%
AR-15 .223 Wylde 24" Tactical Bull Upper Assembly / Right Hand Side Charger W/ BCG
AR-15 .223 Wylde 24" Tactical Bull Upper Assembly, Side Charger. For those who frequently..
-20%
AR-15 .224 Valkyrie 20″ nitride upper assembly / Mlok
The Moriarti Armaments AR-15 .224 Valkyrie 20″ nitride upper assembly / Mlok comes complet..
-50%
AR-15 .224 Valkyrie 20″ stainless steel upper assembly / 15" Mlok
The Moriarti Armaments AR-15 .224 Valkyrie 20″ stainless steel upper assembly comes complete wi..
-30%
AR-15 .300 BLK 16" PISTOL LENGTH UPPER ASSEMBLY / 1:7 / 12" MLOK / TRIPORT
With a 16 inch nitride barrel chambered in 300 blackout, this AR15 upper receiver assembly is readil..
-36%
AR-15 .300 BLK 16" PISTOL UPPER ASSEMBLY /15" MLOK / CERAKOTE & CHOOSE
AR-15 .300 BLK 16" PISTOL LENGTH 1:8 TWIST / 15" MLOK / CERAKOTE & CHOOSE COLOR ON TOP OF PAGE. ..
-30%
AR-15 .350 Legend 16" Carbine Upper Assembly | 15" M-Lok Handguard | Custom Cerakote Gradient Colors | 1:16 Twist | 5/8x24 Thread
Transform your AR-15 with the Moriarti Armaments .350 Legend 16" Carbine Upper Assembly, now availab..
-33%
AR-15 .350 Legend 16" Stainless Black Claw Premium Upper Assembly / M-Lok
Elevate your AR-15 platform with the .350 Legend 16" Stainless Black Claw Premium Upper Assembly, de..
-25%
AR-15 .350 Legend 16" Stainless Steel Fluted Upper Assembly | Mlok Handguard | Carbine-Length Gas System
Take your AR-15 to the next level with the Moriarti Armaments .350 Legend 16" Stainless Steel Fluted..
-56%
AR-15 .350 Legend 16" Tactical Upper Assembly | 12" M-Lok Rail | Custom Upper | Enhanced Performance
AR-15 .350 Legend 16" Tactical Upper Assembly | 12" M-Lok Rail | Custom Upper | Enhanced Performance..
-33%
AR-15 .350 Legend 16" Upper Assembly | 10" Quad Rail | Custom Cerakote Color Options | 1:16 Twist | 5/8x24 Thread
Transform your AR-15 with the Moriarti Armaments .350 Legend 16" Upper Assembly, designed to deliver..
-40%
AR-15 .450 Bushmaster 10.5" Pistol Upper Assembly - Magnum Linear Comp, MLOK Rail
The AR-15 .450 Bushmaster 10.5" Pistol Upper Assembly is a custom-made, high-performance upper desig..
-38%
AR-15 .450 Bushmaster 16" Stainless Upper Assembly / Afterburner / Mlok
The AR-15 .450 Bushmaster 16" Stainless Upper Assembly / Afterburner / Mlok is the perfect upgrade f..
-50%
AR-15 .450 Bushmaster 16" Steel Black Nitride Upper Assembly, Tanker Muzzle Brake, M-LOK Handguard
The AR-15 .450 Bushmaster 16" Steel Black Nitride Upper Assembly is a powerful and durable upgrade f..
-36%
AR-15 .458 SOCOM 10.5" Upper Assembly / 10" MLOK / Tanker
The AR-15 .458 SOCOM 10.5" Upper Assembly offers big-bore power in a compact and efficient design, p..
-50%
AR-15 .458 SOCOM 16" Black Upper Assembly | MLOK Rail | Custom Heavy Brake
The AR-15 .458 SOCOM 16" Black Upper Assembly is designed for big-bore enthusiasts who seek unparall..
-29%
AR-15 .458 SOCOM 16" Faxon Gunner Upper Build / 15" MLOK Rail / Magnum Compensator | Big Bore Performance
The AR-15 .458 SOCOM 16" Faxon Gunner Upper Build delivers exceptional big-bore power with a reliabl..
-34%
AR-15 .50 Beowulf 10.5" Upper Build | 10" Slim Rail | Custom Muzzle Brake
The AR-15 .50 Beowulf 10.5" Upper Build is a powerful and versatile addition to your AR-15 platform,..
-40%
AR-15 .50 Beowulf 16" Black Upper Assembly | MLOK Rail | FDE
The AR-15 .50 Beowulf 16" Upper Assembly offers the power and performance of the 12.7x42 (50 Beowulf..
-40%
AR-15 .50 Beowulf 16" Upper Build W/ 15" Slim Mlok Rail and Custom Brake
This AR-15 .50 Beowulf 16" Upper Build is designed for those who demand high power and precision. Ch..
-38%
AR-15 16" .223 Wylde Diamond Fluted Stainless Tactical Upper / MLOK / CA NY Compliant | Moriarti Arms
The AR-15 5.56/.223 16" Diamond Fluted Stainless Tactical Upper from Moriarti Arms is an excellent u..