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.
Refine Search
-90x90.webp)
-38%
AR-15 5.56 NATO 14.5" Rifle Kit with 10" Quadrail | Choose Your Color | Precision Custom Build
The AR-15 5.56 NATO 14.5" Rifle Kit with a 10" Quadrail offers the ultimate precision and reliabilit..
-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..
-34%
AR-15 5.56 NATO 16" Rifle Kit with 10" Quadrail, Tanker Muzzle Brake, and Camo Burnt Bronze Finish
Build your custom AR-15 with the AR-15 5.56 NATO 16" Rifle Kit, featuring a 10" quadrail, camo burnt..
-40%
AR-15 5.56 NATO 16" Rifle Kit | Slick Side | 10" Quad Rail | LE Stock
Build a classic, versatile AR-15 rifle configuration with this Moriarti 5.56 NATO 16" AR-15 rifle ki..
-28%
AR-15 5.56 NATO 5" BEWARE PISTOL KIT - MLOK - MICRO
Unleash your inner gunsmith with the AR-15 5.56 NATO 5" Pistol Kit, designed for performance, precis..
-50%
AR-15 5.56 NATO 5" Micro ARP Pistol Upper | Blue Accent | CH & Can
The Moriarti AR-15 5.56 NATO 5" Pistol Upper combines compact Micro ARP styling with distinctive blu..
-44%
AR-15 5.56 NATO 5" Moriarti Micro Mini Series Semi-Auto Pistol | Color Option - Blue, FDE, ODG, Grey, Bronze
The most popular pistol, Moriarti 5.56 NATO 5" Micro Mini Series Semi-Auto Pistol, is now avail..
-27%
AR-15 5.56 NATO 5" PISTOL KIT - BILLET UPPER / 4" HANDGUARD / CERAKOTE SPLATTER - CHOOSE YOUR COLOR
AR-15 5.56 NATO 5" PISTOL KIT - BILLET UPPER / 4" HANDGUARD / CERAKOTE SPLATTER - CHOOSE YOUR COLORU..
-25%
AR-15 5.56 NATO 5" PISTOL KIT - SIDE CUT BILLET UPPER WITH 4" COMBAT MODULAR M-LOK HANDGUARD - BURNT BRONZE CERAKOTE ACCENTS
Build your dream AR-15 pistol with this high-performance 5.56 NATO 5" Pistol Kit, featuring side cut..
-20%
AR-15 5.56 NATO 5" Pistol Kit - Side Cut Billet Upper with 4" Handguard | Gradient Color Option
Transform your AR-15 build with this 5.56 NATO 5" Pistol Kit, designed for superior performance and ..
-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..
-28%
AR-15 5.56 NATO 5'' Pistol Kit - Forged Upper / 4'' Super Slim Free Float, Prong Muzzle, and Camo Accents
AR-15 5.56 NATO 5'' Pistol Kit - Forged Upper with 4'' Super Slim Free Float, Prong Muzzle, and Camo..
-38%
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 ..
-33%
AR-15 5.56 NATO 5'' STAY SPOOKY PISTOL KIT - BILLET SLICK UPPER WITH 4'' HANDGUARD- COLOR SET UPPER OPTION
Create the ultimate compact AR-15 with this 5.56 NATO 5" Pistol Kit, featuring a Billet Slick Upper,..
-36%
AR-15 5.56 NATO 5” Micro Pistol Kit w/ SBA3 Brace – Compression Series, No Lower
Push the limits of compact AR performance with the AR-15 5.56/.223 5” Compression Series Micro Pisto..
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..
-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..
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..
-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" 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..
-29%
AR-15 5.56/.223 16" M4 MAGPUL MOE SIGHT TOWER COMPLETE RIFLE KIT - FDE
AR-15 16" 5.56/.223 M4 MAGPUL MOE SIGHT TOWER COMPLETE RIFLE KIT - available in black, FDE and OD Gr..
-27%
AR-15 5.56/.223 16" M4 Tactical Rifle Kit with 15" Mlok Super Slim Handguard - Mil-Spec, USA Made
The AR-15 5.56/.223 16" M4 Tactical Rifle Kit contains all the essential components you need to comp..
-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..
-36%
AR-15 5.56/.223 16" Rifle Build Kit / 10" Mlok / LE Stock
AR-15 5.56/.223 16" Rifle Build Kit / 10" Mlok / LE Stock contains all components to complete y..
-43%
AR-15 5.56/.223 16" Stainless Black Claw rifle build kit /12" mlok / Adaptive Stock
AR-15 5.56/.223 16" Stainless Bear Claw rifle build kit /12" mlok rail contains all components ..
-36%
AR-15 5.56/.223 16" stainless steel diamond rifle kit /12" mlok rail
AR-15 5.56/.223 16" stainless steel diamond rifle kit w/12" mlok rail contains all components t..
-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..
-30%
AR-15 5.56/.223 16" stainless steel spiral rifle kit /12" mlok rail
AR-15 5.56/.223 16" stainless steel spiral rifle kit w/12" mlok rail contains all components to..
-33%
AR-15 5.56/.223 16" stainless steel straight cut rifle kit /12" Mlok
AR-15 5.56/.223 16" stainless steel straight cut rifle kit w/12" Mlok rail contains all compone..
-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..
-36%
AR-15 5.56/.223 5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT / COLOR CHOICE
Build Your Dream AR-15 Pistol – 5.56 Micro KitMake it fun. Make it your own. This AR-15 5.56/.223 5"..
-228x228.webp "AR-15 5.56/.223 5\" MICRO PISTOL KIT /4\" MLOK / COLOR ACCENT CHOICE")
-28%
AR-15 5.56/.223 5" MICRO PISTOL KIT /4" MLOK / COLOR ACCENT CHOICE
Build Your Own Micro AR Pistol with Ease – This comprehensive kit includes everything you need to as..
-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..
-35%
AR-15 5.56/.223 5″ Micro Pistol Kit – 1:5 Twist, Micro Buffer, 4″ M-LOK Rail, Mil-Spec Components
The AR-15 5.56/.223 5″ Micro Pistol Kit from Moriarti Armaments offers a compact and powerful AR pis..
-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 ..
-228x228.webp "AR-15 5.56/.223 7.5\" Mlok Upper Assembly / Shroud / Mlok")
-228x228.webp "AR-15 5.56/.223 7.5\" Mlok Upper Assembly / Shroud / Mlok")
-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..
-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..