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
-28%
300 AAC Blackout 16" Complete AR-15 Upper Assembly with CLAW Muzzle Brake | Moriarti Armaments
16 Inch 300 Blackout Upper – AR-15 300 AAC Blackout 16" Carbine CLAW Upper AssemblyUpgrade your AR-1..
-33%
300 AAC Blackout 16" Complete AR-15 Upper Assembly – Black Canon Edition | Moriarti Armaments
300 Blackout 16 Inch Complete AR-15 Upper Assembly – Black Canon Edition | Moriarti ArmamentsExperie..
-38%
5" 300 Blackout Upper Assembly – AR-15 Pistol Upper with American Flag Engraving & Shark Muzzle Brake | Moriarti Armaments
Upgrade your AR-15 platform with the Moriarti 5 Inch 300 Blackout Upper Assembly, designed for shoot..
-44%
AR-15 .338 ARC 7.5" Pistol Upper Assembly / Mlok Free Float
Upgrade your AR-15 pistol with the .338 ARC 7.5" Pistol Upper Assembly for unmatched power and perfo..
-40%
AR-15 .350 Legend 10" Tactical Upper Assembly | M-Lok Handguard | Cerakote Color Options | 1:16 Twist | 5/8x24 Thread
Upgrade your AR-15 with the Moriarti Armaments .350 Legend 10" Tactical Upper Assembly, now availabl..
-33%
AR-15 .350 Legend 10.5" Mlok Tactical Upper Assembly | Carbine-Length Gas System | A2 Flash Hider
Upgrade your AR-15 with the Moriarti Armaments .350 Legend 10.5" Mlok Tactical Upper Assembly and ta..
-40%
AR-15 .450 Bushmaster 10.5" Pistol Upper Assembly / Tanker
Upgrade your AR-15 pistol with the AR-15 .450 Bushmaster 10.5" Pistol Upper Assembly featuring a tan..
-50%
AR-15 .450 Bushmaster 10.5" Thumper Pistol Upper Assembly / Mlok – Powerful Upgrade for Your AR-15 Pistol
Elevate your AR-15 pistol with the .450 Bushmaster 10.5" Thumper Pistol Upper Assembly, designed for..
-31%
AR-15 .458 SOCOM 10.5" Faxon Gunner Upper Build / MLOK / Magnum Comp | Big Bore Performance
The AR-15 .458 SOCOM 10.5" Faxon Gunner Upper Build offers exceptional big-bore performance in a com..
-40%
AR-15 .458 SOCOM 10.5" Pistol Upper Assembly w/ 10" Free Float Rail | Big Bore Power
The AR-15 .458 SOCOM 10.5" Pistol Upper Assembly offers compact power and big-bore performance, perf..
-35%
AR-15 300 Blackout 16" Med Profile Black Shark Upper Assembly / Mlok
16 Inch 300 Blackout AR-15 Upper Assembly – Black Shark EditionThe Moriarti 16 Inch 300 Blackout Upp..
-40%
AR-15 300 Blackout 5" Centurion Upper Assembly / MLOK – Choose Handguard Color
5 Inch 300 Blackout Pistol Upper – Centurion M-LOK EditionUnleash compact performance with the Moria..
-38%
AR-15 300 Blackout 5" Micro Upper Assembly / Sound Forwarder / Mlok / 1x7
Upgrade your AR-15 build with this 300 Blackout 5" Nitride Upper Assembly from Moriarti Armaments, d..
-38%
AR-15 300 Blackout 5" PISTOL BILLET UPPER / 4'' MLOK / GOLD MUZZLE / CH
AR-15 300 Blackout 5" PISTOL BILLET UPPER / 4'' MLOK / GOLD MUZZLE BRAKE FEATURES:300 Blackout 5 Inc..
-30%
AR-15 300 BLACKOUT 5'' PISTOL BILLET UPPER / CH / 4'' MLOK / STAY SPOOKY- COLOR SET
Moriarti Armaments introduces the Stay Spooky 300 Blackout Pistol Upper, a compact, lightweight, and..
-33%
AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail
AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail is designed with compatibil..
-40%
AR-15 300 BLK 5" Pistol Hybrid Upper Assembly, Spitfire Muzzle, Mlok Handguard, Zombie Green – Moriarti Arms
Elevate your build with the AR-15 300 BLK 5" Pistol Hybrid Upper Assembly in Zombie Green, precision..
-36%
AR-15 300 BLK 5" Pistol Upper Assembly - Gold Spitfire / Mlok
Unleash precision, power, and performance with the AR-15 300 Blackout 5" Pistol Upper Assembly featu..
-228x228.webp "AR-15 350 Legend 7.5\" Mlok Upper Assembly with Shroud and Mlok")
-228x228.webp "AR-15 350 Legend 7.5\" Mlok Upper Assembly with Shroud and Mlok")
-28%
AR-15 350 Legend 7.5" Mlok Upper Assembly with Shroud and Mlok
Key Features:Barrel:7.5″ Barrel chambered in 350 Legend, perfect for short-barrel applications.4150 ..
-30%
AR-15 4.5" .22LR Dedicated Upper Assembly with M-LOK Handguard & Flash Can Comp
The 4.5" .22LR Dedicated Upper Receiver from Moriarti Armaments is the perfect upgrade for your AR-1..
-42%
AR-15 4.5" Micro APR Suppressor Ready Pistol Upper Assembly – Choose Caliber & Color
The AR-15 4.5" Micro APR Suppressor Ready Pistol Upper Assembly is a compact, high-performance upper..
-33%
AR-15 4.5" Micro ARP Pistol Upper Assembly / Mini Can - Caliber Choice
The AR-15 4.5" Micro ARP Pistol Upper Assembly with Mini Can - Caliber Choice is designed to de..
-38%
AR-15 5" Pistol Upper Assembly | Suppressor Ready | Choose Caliber & Color
Unlock precision, power, and reliability with the AR-15 5" Pistol Upper Assembly, equipped with M-LO..
-36%
AR-15 5.56 NATO 16" Carbine Upper Assembly with 15" M-LOK Handguard | CERAKOTE GRAD Colors | Tactical Charging Handle
Build your dream AR-15 with the Moriarti Arms® 5.56 NATO 16" Carbine Upper Assembly, designed for pe..
-30%
AR-15 5.56 NATO 5" Pistol Upper Assembly / Gold Spitfire/ Mlok
AR-15 5.56 NATO 5" Pistol Upper Assembly with Gold Spitfire and 4" M-LOK HandguardElevate your shoot..
-50%
AR-15 5.56 NATO 5" Pistol Upper Assembly / Red Accent / Charging Handle Included | Black Nitride Barrel
Enhance your AR-15 build with this high-performance 5.56 NATO 5" Pistol Upper Assembly, designed for..
-50%
AR-15 5.56 NATO 5'' PISTOL UPPER / BLUE ACCENT / CH / CAN
AR-15 5.56 NATO 5" Pistol Upper Assembly - Blue Accent | Charging Handle Included | Black Nitride Ba..
-40%
AR-15 5.56 NATO 5″ Pistol Upper Assembly with Charging Handle, 4″ M-LOK Handguard, 1:5 Twist, Custom Cerakote Options
This 5.56 NATO pistol features a 5" pistol length barrel with a 1:5 5R twist, all made in the USA an..
-38%
AR-15 5.56/.223 16" Govt Profile BLACK SHARK Upper Assembly / MLOK
Upgrade your AR-15 build with the AR-15 5.56/.223 16" "BLACK SHARK" Upper Assembly. Designed for pre..
-33%
AR-15 5.56/.223 10.5" GOV'T MAGPUL MOE UPPER ASSEMBLY / FRONT SIGHT
AR-15 5.56/.223 10.5" GOV'T MAGPUL MOE UPPER ASSEMBLY / FRONT SIGHTAction: Semi-auto Gas Sy..
-33%
AR-15 5.56/.223 10.5" M-LOK Upper Assembly | Gold Barrel | Pineapple Muzzle Brake
The AR-15 5.56/.223 10.5" M-LOK Upper Assembly is the perfect choice for those seeking a compact, hi..
-50%
AR-15 5.56/.223 10.5" Pistol Upper Assembly – MLOK Handguard, A2 Flash Hider | Moriarti Armaments
The Moriarti AR-15 10.5” 5.56 NATO Pistol Upper is a top-tier choice for those building a compact, r..
-38%
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..
-38%
AR-15 5.56/.223 16" M4 Carbine Upper with 15" M-LOK Handguard and Claw Muzzle Brake – 1:7 Twist, Carbine-Length, Moriarti Arms
The AR-15 16" M4 Carbine Upper Assembly from Moriarti Arms delivers dependable performance, modular ..
-43%
AR-15 5.56/.223 16" M4 MAGPUL MOE FLAT TOP UPPER ASSEMBLY - OD GREEN
Action: Semi-auto Gas System: Carbine Length Gas System Chamber: 5.56 NATO Muzzl..
-43%
AR-15 5.56/.223 16" M4 Magpul MOE Flat Top Upper Assembly – FDE
Upgrade your AR-15 build with the 5.56/.223 16" M4 Magpul MOE Flat Top Upper Assembly in FDE. Design..
-40%
AR-15 5.56/.223 16" M4 Upper Assembly with Triport Muzzle Brake and M-LOK Handguard - Choose Color
Manufactured by Moriarti Armaments – CA & NY Compliant. Choose color on top of page - available ..
-50%
AR-15 5.56/.223 16" M4 Upper with Magpul MOE Handguard – 1:7 Twist, Carbine-Length, Flat Top – Black | Moriarti Arms
The AR-15 16" M4 Flat Top Upper Assembly with Magpul MOE Handguard delivers rugged reliability and p..
-49%
AR-15 5.56/.223 16" M4 Upper with Red MLOK Handguard & Custom Pineapple Muzzle Brake | Moriarti Arms
Make a statement at the range with the AR-15 5.56/.223 16" M4 Red Upper Assembly with Custom Pineapp..
-50%
AR-15 5.56/.223 16" Stainless Steel Premium Quad Rail Upper – .223 Wylde, 1:8 Twist | Moriarti Armaments
Upgrade your AR-15 with Moriarti's 16” Stainless Steel Premium Quad Upper, designed for performance,..
-28%
AR-15 5.56/.223 16" Stainless Steel Spiral Fluted "Black Shark" Upper Assembly / Mlok
The AR-15 5.56/.223 16 Stainless Steel Spiral Fluted Black Shark Upper Assembly / Mlok is a reliable..
-40%
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..
-40%
AR-15 5.56/.223 24" Spiral Stainless Steel Fluted Upper Assembly | M-LOK | Triport Muzzle Brake
Enhance your AR-15 build with the 24" Spiral Stainless Steel Fluted Upper Assembly, engineered for p..
-25%
AR-15 5.56/.223 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail
AR-15 5.56/.223 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail - current ETA 4-7 weeksFo..
-47%
AR-15 5.56/.223 5.5" Pistol Upper Assembly – Sidewinder Blast Diffuser, M-Lok Rail, Micro Gas System
The AR-15 5.56/.223 5.5" Pistol Upper Assembly is designed for shooters looking for a compact and po..
-33%
AR-15 5.56/.223 7.5" Mlok Upper Assembly / Blue Shroud / Blue Accents / CH
AR-15 5.56/.223 7.5" Mlok Upper Assembly / Blue Shroud / Blue Accents / Charging HandleChamber ..
-33%
AR-15 5.56/.223 7.5" Mlok Upper Assembly / Shroud / Mlok
The AR-15 5.56/.223 7.5" M-LOK Upper Assembly from Moriarti Armaments offers a compact and powerful ..
-33%
AR-15 5.56/.223 7.5" Pentagram Upper Assembly / Mlok
AR-15 5.56/.223 7.5" Pentagram Upper Assembly / Mlok Includes:Action: Semi-auto Gas System:&..
-228x228.webp "AR-15 5.56/.223 7.5\" Pistol Upper Assembly with 7\" Fake Can & M-LOK Free Float Rail")
-228x228.webp "AR-15 5.56/.223 7.5\" Pistol Upper Assembly with 7\" Fake Can & M-LOK Free Float Rail")
-33%
AR-15 5.56/.223 7.5" Pistol Upper Assembly with 7" Fake Can & M-LOK Free Float Rail
The AR-15 5.56/.223 7.5" Pistol Upper Assembly with 7" Fake Can & M-LOK Free Float Rail is a com..
-46%
AR-15 5.56/.223 7.5" Shark Muzzle M-LOK Pistol Upper – 1:7 Twist, 4150 CMV, Nitride | Moriarti Armaments
Dominate your next AR pistol build with the AR-15 7.5" Shark Muzzle MLOK Upper Assembly from Moriart..