AR-15 Parts, Rifles, Uppers & Accessories
AR-15 Rifles, Kits & Gun Accessories
Welcome to the AR-15 hub at Moriarti Armaments—your one-stop destination for AR-15 rifles, pistols, upper assemblies, complete lowers, parts, kits, barrels, triggers, handguards, magazines, optics, and accessories. Whether you're building a custom rifle, upgrading an existing firearm, or replacing worn components, you'll find quality products engineered for reliability and performance. Browse complete AR-15 solutions and individual components for popular calibers including 5.56 NATO, .223 Wylde, 300 AAC Blackout, 7.62x39, 6.5 Grendel, 6MM ARC, .224 Valkyrie, .350 Legend, .400 Legend, .450 Bushmaster, .458 SOCOM, .50 Beowulf, 12.7x42, and more.
Why is the AR-15 platform so popular?
The AR-15 platform is popular because of its modular design, broad parts availability, caliber selection, and ability to support many different configurations. AR-15-style firearms can be configured for cartridges including 5.56 NATO/.223 Remington, 300 Blackout, 6.5 Grendel, 6.8 SPC II, 7.62x39, .350 Legend, .400 Legend, .450 Bushmaster, .50 Beowulf/12.7x42, and .338 ARC, depending on the components used. Shooters can also choose among different barrel lengths, handguards, stocks or pistol configurations, triggers, optics, and finishes.
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AR-15 .400 Legend 10.5" Pistol Barrel | 1:16 Twist | Pistol Gas
Build a compact .400 Legend AR-15 configuration around this 10.5" .400 Legend pistol barrel. Manufac..
-31%
AR-15 .400 Legend 10.5" Pistol Kit | Slick Side | 10" Quad Rail
Configure a compact .400 Legend AR-15 with this Moriarti 10.5" .400 Legend pistol kit. The package c..
-33%
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..
AR-15 / AR-10 Walking Dead Compensator, 5/8x24 TPI, Nitride
The Walking Dead Compensator is designed to offer superior recoil management and muzzle control, mak..
-20%
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 ..
-33%
AR-15 5.56 NATO 7.5" Moriarti Arms 'The Transformer' Enhanced TakeDown Semi Auto Pistol | SBA3 | Compact, Versatile, and Customizable
The AR-15 5.56 NATO 7.5" Moriarti Arms 'The Transformer' Enhanced TakeDown Semi Auto Pistol is the p..
-28%
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..
-36%
AR-15 5.56/.223 16" Black Diamond Modular Bull Upper Assembly / Mlok
AR-15 5.56/.223 16" black diamond modular bull upper assembly is offered exclusively by Moriarti Arm..
-45%
AR-15 5.56/.223 16" Blue Diamond Fluted Tactical Upper w/ 12" MLOK & Triport Brake | Moriarti Arms
Bring performance and bold design together with the AR-15 5.56/.223 16" Blue Diamond Tactical Upper ..
AR-15 5.56/.223 16" RED DIAMOND FLUTED HEAVY BARREL / SS / 1:8 TWIST
AR-15 5.56/.223 16" RED DIAMOND FLUTED HEAVY BARREL / SS / 1:8 TWIST. CURRENT ETA: 3-5 WEEKS, ..
-22%
AR-15 5.56/.223 16" stainless steel diamond pulse fluted tactical bull upper assembly
AR-15 5.56/.223 16" stainless steel diamond pulse fluted tactical bull upper assembly. Specs:A3..
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AR-15 5.56/.223 16" Stainless Steel Tactical Bull Upper Assembly / Mlok
AR-15 5.56/.223 16" Stainless Steel Tactical Bull Upper Assembly / Mlok Features:Barrel - 16" 416 st..
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AR-15 5.56/.223 16" stainless steel x-treme fluted bull upper assembly / Mlok
AR-15 5.56/.223 16" stainless steel x-treme fluted tactical bull upper assembly includes:Barrel - 16..
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AR-15 5.56/.223 16" Stainless Straight Fluted Modular Upper Assembly / Bull / Mlok
AR-15 5.56/.223 16" Stainless Straight Fluted Modular Upper Assembly / Bull / Mlok is offered exclus..
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AR-15 5.56/.223 16" yellow diamond modular bull upper assembly
AR-15 5.56/.223 16" yellow diamond modular bull upper assembly is offered exclusively by Moriarti Ar..
AR-15 5.56/.223 24" black nitride bull upper assembly / 15" Mlok
Maximize Precision with the AR-15 5.56/.223 24" Black Nitride Modular Bull Upper AssemblyTake your s..
AR-15 5.56/.223 24" Spiral Black Claw stainless upper assembly / Bull / Mlok
AR-15 5.56/.223 24" Black Claw stainless steel fluted upper assembly includes: Barrel - 24" 416..
AR-15 5.56/.223 WYLDE 16" DIAMOND FLUTED STAINLESS STEEL BARREL, 1X8
AR-15 5.56 16" DIAMOND FLUTED STAINLESS STEEL HBAR BARREL. MADE FROM 416R STAINLESS STEEL HARDE..
AR-15 5.56/.223 Wylde 24" Diamond Fluted Rifle Kit / 15" Slim M-LOK / Adaptive Stock / No BCG – Moriarti Armaments
Push long-range performance and accuracy to the next level with this AR-15 5.56/.223 Wylde 24" Diamo..
-38%
AR-15 5.56/.223 Wylde 24" Spiral Fluted Nitride Rifle Kit / 15" Mlok / Adaptive Stock
AR-15 5.56/.223 Wylde 24" Spiral Fluted Nitride Rifle Kit / 15" Mlok / Adaptive Stock. The kit comes..
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AR-15 5.56/.223 Wylde, 24" Black Nitride Spiral Fluted Heavy Barrel - 1:8 Twist, Rifle Length Gas System
The AR-15 5.56/.223 Wylde 24" Black Nitride Spiral Fluted Heavy Barrel is engineered for precision a..
-14%
AR-15 6.5 Grendel 16" Nitride Upper Assembly, Left Hand, 1:8 Twist, 15" M-LOK Free Float Handguard
The AR-15 6.5 Grendel 16" Nitride Upper Assembly (Left Hand) is the perfect drop-in solution for upg..
AR-15 7.62x39 bolt assembly LEFT HAND
The AR-15 7.62x39 Bolt Assembly – Left-Hand is the perfect upgrade or replacement part for your left..
-13%
AR-15 Left Hand 16" 5.56 NATO Slim M-LOK Upper - 4150 CMV 1:7 Twist - Moriarti Armaments
This Left Handed AR-15 Upper offers top-tier performance with a 16" 5.56 NATO barrel, perfect for le..
AR-15 LEO TakeDown Integrated Upper Kit – 7075 Billet Aluminum, Black
The AR-15 LEO TakeDown Integrated Upper Kit is the ultimate upgrade for AR-15 enthusiasts who want v..
AR-15 Micro Pistol Buffer System Kit – 5.56 & 9MM Compatible, 5.75" Tube | Mil-Spec, Color Options
Upgrade your compact AR pistol build with the AR-15 Micro Pistol Buffer System, engineered for compa..
AR-15 Moriarti Duo TakeDown 16" Carbine Upper Assembly | 5.56 Nato and 300 Blk Complete Combo
AR-15 Moriarti Duo TakeDown 16" Carbine Upper Assembly | 5.56 Nato and 300 Blk Complete Combo - you ..
AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 10.5" | 5.56 Nato and 350 Legend Complete Combo
AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 10.5" | 5.56 Nato and 350 Legend Comp..
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AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 5.56 Nato and 300 Blk Complete Combo
AR-15 Moriarti Duo TakeDown Pistol Upper Assembly | 5.56 Nato and 300 Blk Complete Combo allows for ..
AR-15 Non-Reciprocating Side Charging Billet Upper Receiver - Multi Caliber
Elevate your AR-15 platform with the Non-Reciprocating Side Charging Billet Upper Receiver from New ..
-50%
AR-15 Polished Aluminum Lightweight Competition Bolt Carrier Group - Blue
Take your AR-15 to the next level with the Polished Aluminum Lightweight Competition Bolt Carrier Gr..
AR-15 Skeleton 80% Lower Receiver – 7075 Forged Aluminum, Multi-Caliber | Moriarti Arms
The Moriarti Arms AR-15 Skeleton 80% Lower Receiver offers a lightweight yet rugged foundation for y..
AR-15 Slim Line ‘Trident’ Flash Can with Glass Breaker | Rainbow PVD Coated | 1/2x28 Thread
The AR-15 Slim Line ‘Trident’ Flash Can with Glass Breaker combines aggressive styling and superior ..
AR-15 walking dead flash suppressor, 1/2-28 threads, stainless steel
AR-15 walking dead flash suppressor, 1/2-28 threads, stainless steelMade from solid stainless steel ..
-14%
AR-15/AR-10 7" THREAD-ON FAKE SUPPRESSOR, 5/8x24, G2
AR-15/AR-10 7" THREAD-ON FAKE SUPPRESSOR, NITRIDE, 5/8x24, G2New and Improved Gen 2 ModelOverall Len..
AR-15/AR-9 Micro Slip Over Barrel Shroud With Multi Port Muzzle Brake - PVD
US MadeT6 AluminumNew Micro DesignTotal Weight: 3.2 ozLength: 3″Will Work On 9mm With 1/2 x 28 Threa..
AR-400 Legend 7.5" Government Profile Pistol Barrel – 1:16 Twist, 4150 CrMoV, Black Nitride
Built for short, powerful AR pistols, this 7.5” .400 Legend barrel features a Government profile, 1:..
AR-74 5.45x39 Tactical Rifle Kit – 16" Barrel, Quadrail, LE Stock, No Lower
The AR-74 5.45x39 Tactical Rifle Kit from Moriarti Armaments brings military-grade ballistics and mo..
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Combo Set: .22LR Kit – 9" Barrel, Stainless Bolt Group & Charging Handle
Get everything you need to upgrade your AR-15 with our comprehensive .22LR Combo Set. This kit featu..
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Combo Set: Dedicated .22LR Kit – 4.5" Barrel, Stainless Bolt Group & Charging Handle
Enhance your AR-15 with our dedicated .22LR Kit, designed for compact and efficient performance. Thi..
Diamondback DB15 5.56/.223 Semi-Automatic Rifle – M-LOK – 16" Barrel – Made in USA
Introducing the Diamondback DB15, a semi-automatic rifle that combines military-grade performance wi..
Moriarti .22LR Conversion Chamber Adapter for AR-15 .223/5.56 – Stainless Steel | CMMG-Compatible
Easily convert your standard AR-15 upper chambered in .223/5.56 to accept .22LR rounds with this CMM..
-33%
Moriarti AR-15 400 Legend 10.5" Pistol Upper – Nitride 4150 CMV Barrel, M-LOK Rail, A2 Flash Hider
The Moriarti AR-15 400 Legend 10.5" Pistol Upper Assembly offers unmatched ballistic power in a comp..
MORIARTI AR-300 Blackout 16" Diamond Cut 12" M-LOK Upper Assembly – Black
Elevate your AR platform with the MORIARTI AR-15 300 Blackout 16" Diamond Cut Upper Assembly, engine..
MORIARTI AR-74 5.45X39 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2 / BLACK
The Moriarti Armaments AR-74 5.45X39 16" Diamond Cut 12" MLOK Upper Assembly / A2 / Black is a high-..
Moriarti AR-74 5.45x39 16" MLOK Upper Assembly / Slip Over Barrel Shroud
The AR-74 5.45x39 16" MLOK Upper Assembly offers a powerful, versatile, and unique shooting experien..
Moriarti Armaments AR-15 5.45X39 "Vortex Vanguard" 16" M4 Sporting Rifle - MLOK/LE Stock
The Moriarti Armaments AR-15 5.45X39 "Vortex Vanguard" 16" M4 Sporting Rifle is a cutting-edge, high..
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Red Diamond Tactical AR-15 5.56/.223 16" Upper Assembly - M-LOK
Elevate your AR-15 with the Red Diamond Tactical 16" Upper Assembly, designed exclusively for Moriar..
Strike Industries Cookie Cutter Muzzle Brake - AR-15/AR-10 | Recoil & Muzzle Rise Compensator | Choose Thread Size
The Strike Industries Cookie Cutter Muzzle Brake is a game-changer for shooters looking to eliminate..