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.
What parts do I need to build an AR-15?
A complete AR-15 build typically requires an upper assembly, lower receiver, lower parts, barrel, bolt carrier group, charging handle, stock or brace, buffer system, magazine, and compatible accessories. Product requirements may vary depending on your build configuration.
Refine Search
-90x90.webp)
-19%
AR-15 350 Legend 18" Semi-Auto Rifle | 15" Free Float M-LOK | Multi-Cal Stock | Moriarti Armaments
Upgrade your AR-15 platform with the 350 Legend 18" Semi-Auto Rifle from Moriarti Armaments. The 350..
-33%
AR-15 350 Legend 18" Upper Assembly / Left Hand / Slick Side / 15" Free Float Rail
Supercharge your AR-15 with the 350 Legend 18" Upper Assembly, designed specifically for left-handed..
-39%
AR-15 350 Legend Moriarti 10.5" Semi Auto Pistol / Mlok / SBA3 – Classic Edition
AR-15 350 Legend Moriarti 10.5" Semi Auto Pistol / Mlok / SBA3 – Classic EditionUpgrade your AR-15 w..
-33%
AR-15 5" 5.56 NATO PISTOL KIT / MLOK / CERAKOTE ACCENT / CLASSIC
AR-15 5" 5.56 NATO PISTOL KIT / MLOK / CERAKOTE ACCENT / CLASSIC. The kit comes WITHOUT 8..
-14%
AR-15 5.56 16" Complete Airlight Series Rifle Kit - Left Hand | Various Colors
The AR-15 5.56 16" Complete Airlight Series Rifle Kit is the ultimate solution for left-handed gun e..
-30%
AR-15 5.56 16" Upper Assembly - Blue Titanium Cerakote, M-Lok Handguard, A2 Flash Hider
The AR-15 16" 5.56 Upper - Blue Titanium Cerakote is designed for shooters seeking durability a..
AR-15 5.56 CAL 5.5" Fake Suppressor | Barrel Extension | Choose Color | 1/2x28 TPI
Add a tactical flair to your AR-15 with the 5.56 CAL 5.5” Fake Suppressor. Constructed from T6 alumi..
-35%
AR-15 5.56 NATO 10.5" Moriarti Arms SBR |Magpul| Sights| Mag
Note: This is an NFA regulated short barreled rifle (SBR). Know your jurisdiction's NFA laws before ..
-23%
AR-15 5.56 NATO 11.5" 4150 CMV Nitride Barrel | Carbine-Length Gas System, 1/2x28 Thread
Enhance your AR-15 build with this high-performance AR-15 5.56 NATO 11.5" barrel. Crafted from 4150 ..
-23%
AR-15 5.56 NATO 12.5" Carbine Barrel | M4 Profile, 1:8 Twist, Nitride Finish
The AR-15 5.56 NATO 12.5" Carbine Barrel is designed for shooters seeking a compact, reliable barrel..
AR-15 5.56 NATO 13.9" 4150 CMV Barrel / Pencil Profile / Mid-Length / 1:7 Twist
AR-15 5.56 NATO 13.9" 4150 CMV Barrel / Pencil Profile / Mid-Length / 1:7 Twist Manufacturer:..
AR-15 5.56 NATO 16" Carbine Length Barrel 1:7 Twist / Tin Coated
AR-15 5.56 NATO 16" Carbine Length Barrel 1:7 Twist / Tin CoatedLength: 16"5.56 NATO1:7 Twist.750" g..
-34%
AR-15 5.56 NATO 16" Carbine Rifle Kit / 12" Mlok / LE / Color Accents - Choose Yours
AR-15 5.56 NATO 16" Carbine Rifle Kit / 12" Mlok / LE / Color Accents - Choose Yours Build your dre..
-50%
AR-15 5.56 NATO 16" Mid Length Govt Profile Barrel 1:7 with Free Complete Bolt | Combo Deal
Upgrade your AR-15 build with the AR-15 5.56 NATO 16" Mid Length Govt Profile Barrel 1:7 and get a F..
AR-15 5.56 NATO 16" stainless socom barrel, mid length, 1-8 twist
AR-15 5.56 16" nato stainless socom barrel mid length 1-8 twist. MADE FROM 416R STAINLESS STEEL AND ..
-28%
AR-15 5.56 NATO 5" AMERICAN EAGLE PISTOL KIT - 4" HANDGUARD - MICRO
Kit Includes Everything to Complete Your AR-15 Pistol Build (Excluding Lower Receiver). Get rea..
-38%
AR-15 5.56 NATO 5" Cookie Cutter Upper Assembly – MLOK, Anodized Black
Upgrade your AR-15 build with the 5.56 NATO 5" Cookie Cutter Upper Assembly. Designed for high-perfo..
-41%
AR-15 5.56 NATO 5" Moriarti Micro Mini Series Semi-Auto Pistol | Ergo Grip | Micro Buffer
The AR-15 5.56 NATO 5" Moriarti Micro Mini Series Semi-Auto Pistol is engineered for those who appre..
-33%
AR-15 5.56 NATO 5" Pistol Kit - Forged Upper, 4" M-LOK, Choose Your Accent Color: Blue, Silver, or Gold
Build your dream AR-15 pistol with this 5.56 NATO 5" Pistol Kit, designed for ultimate performance a..
-24%
AR-15 5.56 NATO 5" Pistol Kit – Slick Upper, 4" M-LOK Rail, Spider Dust Cover – Color Option
Build Your Custom AR Pistol – American Made. High Quality. No FFL Required.Take your AR pistol build..
-18%
AR-15 5.56 NATO 5'' PISTOL KIT - 4'' HANDGUARD / CAMO / PRONG / MICRO - CHOOSE COLOR
AR-15 5.56 NATO 5'' PISTOL KIT - 4'' HANDGUARD / CAMO / PRONG / MICRO - AVAILABLE IN PINK, TIF..
-43%
AR-15 5.56 NATO 5'' PISTOL UPPER ASSEMBLY / BILLET UPPER / GOLD MUZZLE BRAKE
AR-15 5.56 NATO 5'' PISTOL UPPER ASSEMBLY / BILLET UPPER / GOLD MUZZLE BRAKE FEATURES: Chamber:&n..
-23%
AR-15 5.56 NATO 5'' SLICK BILLET UPPER ASSEMBLY / 4'' MLOK / SHARK / FLAG DC and CH
AR-15 5.56 NATO 5'' BILLET UPPER ASSEMBLY / 4'' MLOK / SHARK / FLAG DC and CH:Featuring a sleek desi..
-47%
AR-15 5.56 NATO 6" Modular Pistol Upper Assembly | Hybrid MLOK | A2 Flash Hider
Upgrade your AR-15 build with the Moriarti Arms 6" 5.56 NATO Modular Pistol Upper Assembly—engineere..
AR-15 5.56 NATO 7.5" Complete Billet Side Charging Upper / Non-Reciprocating / BCG
AR-15 5.56 NATO 7.5" Complete Billet Side Charging Upper / Non-Reciprocating This drop-in upper..
-28%
AR-15 5.56 NATO 7.5" Pistol Kit - Fear Nothing Accent - Classic - CERAKOTE Choice
Build Your Dream AR-15 Pistol! Available in Tiffany Blue, White, Red, Orange, Pink color ..
-27%
AR-15 5.56 NATO 7.5'' PISTOL KIT / SLICK / 7'' MLOK - COLOR SET OPTION
AR-15 5.56 NATO 7.5" PISTOL KIT / SLICK / 7" M-LOK – COMPLETE YOUR RIFLE BUILD WITH CUSTOM COLOR OPT..
AR-15 5.56 NATO/.223 Wylde 20" Stainless Steel Hbar Heavy Barrel, 1-8 Twist
AR-15 5.56 20" Stainless Hbar Heavy Steel Barrel 1-8 Twist. Made In the USA. C..
-34%
AR-15 5.56/.223 7.5" Ultimate Shorty Pistol Kit - MLOK / SBA3 /Black
AR-15 5.56/.223 7.5" Pistol Kit – M-LOK / SBA3 / Black – Build Your Ultimate Shorty!Ready to build y..
-17%
AR-15 5.56/.223 - 24″ BARREL / .223 WYLDE / 1:8 / PHOSPHATE
AR-15 5.56/.223 - 24″ BARREL / .223 WYLDE / 1:8 / PHOSPHATE 4150 CMV, PHOSPHATE1-8 rh twist. ..
-38%
AR-15 5.56/.223 10.5" Pistol Upper Assembly / Shroud / Burnt Bronze
AR-15 5.56/.223 10.5" Pistol Upper Assembly with Shroud – Burnt Bronze Cerakote FinishElevate your A..
-33%
AR-15 5.56/.223 10.5'' CARBINE UPPER ASSEMBLY / M-LOK / ROCKET MAN
AR-15 5.56/.223 10.5'' CARBINE UPPER ASSEMBLY / 10'' M-LOK / ROCKET MAN is a perfect addition to you..
-25%
AR-15 5.56/.223 16" AirLite Rifle Kit – Color-Matched Upper & Furniture | Ultra-Light Build | Choose Your Color
Make it fun. Make it your own. Whether you're building your first AR or adding some serious flair to..
-45%
AR-15 5.56/.223 16" Black Diamond Fluted Tactical Upper w/ 12" MLOK & Xtreme Brake | Moriarti Arms
Stand out with precision and style with the AR-15 5.56/.223 16" Black Diamond Tactical Upper Assembl..
-30%
AR-15 5.56/.223 16" BLACK DIAMOND SEMI AUTO RIFLE / MAGPUL MOE / MAG
AR-15 5.56/.223 16" BLACK DIAMOND SEMI AUTO RIFLE / MAGPUL MOE / 1 MAGAZINE INCLUDED • ..
-27%
AR-15 5.56/.223 16" CARBINE RIFLE KIT / 12" M LOK / TRIBAL / ACCENT COLOR OPTION - RED / BLUE
AR-15 5.56/.223 16" CARBINE RIFLE KIT / 12" M LOK / ACCENT COLOR OPTION - RED / BLUEBarrel - 16..
-26%
AR-15 5.56/.223 16" Carbine Upper Assembly / Gold Finish / Triport Muzzle Brake
Upgrade your AR-15 with this 5.56/.223 16" Carbine Upper Assembly featuring a stunning Gold TiN Coat..
-27%
AR-15 5.56/.223 16" Diamond Fluted Upper Assembly | Left Hand | Slick Side Upper Receiver
The AR-15 5.56/.223 16" Diamond Fluted Upper Assembly is a premium choice for left-handed shooters l..
-45%
AR-15 5.56/.223 16" Green Diamond Tactical Upper Assembly / Mlok
AR-15 5.56/.223 16" Green Diamond Tactical Upper Assembly / Mlok. Barrel is exclusively designed for..
-34%
AR-15 5.56/.223 16" M4 CARBINE RIFLE KIT / MAGPUL SL FURNITURE / CERAKOTE OPTIONS / 15" MLOK
AR-15 5.56/.223 16" M4 M-LOK CARBINE RIFLE KIT / MAGPUL FURNITURE / CERAKOTE OPTIONS AVAILABLE. ..
-38%
AR-15 5.56/.223 16" M4 Carbine Upper w/ 15" MLOK Rail – Cerakote Finish | FDE, ODG, Grey | Moriarti Arms
Customize your build with a top-tier AR-15 5.56/.223 16" M4 Carbine Upper Assembly, available in you..
-37%
AR-15 5.56/.223 16" M4 Rifle Build Kit – SOPMOD Stock, Ergo Grip, Muzzle Brake, 15” M-LOK Handguard
AR-15 5.56/.223 16" M4 Rifle Build Kit – SOPMOD Stock, Ergo Grip, Muzzle Brake, 15” M-LOK HandguardB..
-33%
AR-15 5.56/.223 16" MA-12 Advanced Rifle Kit / Side Charger /A2 Stock
The MA-12 kit is the latest evolution of the precision 5.56/.223 Wylde semi-automatic rifle. The k..
-29%
AR-15 5.56/.223 16" MINIMALIST SERIES RIFLE KIT / PURPLE ACCENTS / 15" MLOK
AR-15 5.56/.223 16" MINIMALIST SERIES RIFLE KIT / PURPLE ACCENTS / 15" MLOK INCLUDES:Barrel: ·&nb..
-28%
AR-15 5.56/.223 16" MLOK UPPER ASSEMBLY WITH SLIP OVER BARREL SHROUD
Perfect for your next build, this 16" MLOK Upper Assembly is designed to give your AR-15 a sleek, ve..
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: 2-3 WEEKS, ..
-28%
AR-15 5.56/.223 16" slick side diamond stainless steel upper assembly / 10" Mlok / Tri
This AR-15 5.56/.223 16" Upper Assembly is perfect for building or upgrading your rifle. CA/NY compl..
-25%
AR-15 5.56/.223 16" Stainless Steel Spiral Fluted Upper Assembly | Mlok | Tactical Upgrade
Upgrade your AR-15 with this 5.56/.223 16" Stainless Steel Spiral Fluted Upper Assembly designed for..
-33%
AR-15 5.56/.223 16″ Straight Flute Barrel – 1:8 Twist, Nitride, .223 Wylde
The AR-15 16″ Straight Flute Barrel is designed for precision and durability. Machined from 4150 CMV..
-27%
AR-15 5.56/.223 17.1" Pentagon Black Nitride Upper Assembly / Mlok / Triport Brake
Elevate your AR-15 build with the AR-15 5.56/.223 17.1" Pentagon Black Nitride Upper Assembly. This ..