AR-15 Parts & Components
AR-15 Parts & Components
Shop AR-15 parts and components for replacement, customization and compatible AR-platform configurations. Explore barrels, bolt carrier groups, handguards, lower parts, triggers, charging handles, stocks, buffer components, gas-system parts, muzzle devices and more. Moriarti offers AR-15 components across popular calibers, finishes and configurations, making it easy to browse individual parts or coordinate components for your firearm. Use the categories below to find the specific AR-15 parts you need.
What parts are commonly replaced or upgraded on an AR-15?
Common AR-15 replacement and upgrade parts include handguards, triggers, stocks, grips, charging handles, muzzle devices and controls, while components such as barrels, bolt carrier groups, buffers and gas-system parts are generally selected according to the firearm's specific caliber and configuration.
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AR-15 .400 Legend 16" Barrel | 1:16 Twist | Carbine Gas
Configure a .400 Legend AR-15 rifle around this 16" .400 Legend barrel, manufactured from durable 41..
AR-15 .400 Legend 18" Barrel | 1:16 Twist | Carbine Gas
Built for a longer .400 Legend AR-15 rifle configuration, this 18" .400 Legend barrel combines a med..
-54%
AR-15 .450 Bushmaster / .458 SOCOM Complete Bolt Assembly – Parkerized | MPI Inspected
Complete AR-15 bolt assembly for .450 Bushmaster and .458 SOCOM configurations. The assembly comes w..
-37%
AR-15 .458 SOCOM / .450 BUSHMASTER Nitride Bolt Carrier Group – MPI Tested
Upgrade your big-bore AR-15 build with this robust AR-15 .458 SOCOM / .450 BUSHMASTER Bolt Carrier G..
AR-15 .458 SOCOM Flat Top Upper Receiver, Stripped
Upgrade your AR-15 build with the .458 SOCOM Flat Top Upper Receiver. Designed for large-bore calibe..
AR-15 .458 SOCOM TANKER STYLE STEEL MULTI-PORT COMPENSATOR – 5/8x32
AR-15 .458 SOCOM TANKER STYLE STEEL MULTI-PORT COMPENSATOR – 5/8x32Maximize control, minimize recoil..
AR-15 .50 Beowulf Multiport Compensator | 49/64x20 Thread | Black Nitride Finish | Reduce Recoil
Optimize your AR-15 build with the .50 Beowulf Multiport Compensator. This advanced Gen 2 design fea..
AR-15 / AR-10 TANKER STYLE Steel Multi-Port Compensator | Reduce Muzzle Climb & Recoil
Upgrade your AR-15 or AR-10 with the Tanker Style Steel Multi-Port Compensator from Moriarti Armamen..
AR-15 12.7x42 18" Parkerized Heavy Barrel | 1:20 Twist | Mid-Length Gas System
Experience top-tier precision and durability with the AR-15 12.7x42 18" barrel. Made from 4150 Chrom..
-23%
AR-15 12.7x42 50B 16" Parkerized Heavy Barrel, 1:20 Twist, Carbine
Elevate your AR-15 build with the 12.7x42 16" heavy barrel, designed for precision, durability, and ..
-31%
AR-15 300 AAC Blackout 10.5" 4150 CMV Barrel, 1-7 twist, Govt Profile, Nitride
MADE FROM 4150 CMV AND HARDENED TO 26-32 RC AND STRESS RELIEVED, PLATED BLACK. 1-7 RH TWIST ..
AR-15 300 Blackout 16" stainless steel spiral fluted barrel , 1-7 , carbine
AR-15 300 Blackout 16" stainless steel spiral fluted barrel 1-7 twist. MADE FROM 416R STAINLESS STEE..
AR-15 300 Blackout 16" Stainless Steel Straight Fluted Barrel - 1:7 Twist, Carbine Gas System
Enhance your AR-15 build with the 300 Blackout 16" stainless steel barrel, designed for superior per..
AR-15 300 Blackout 6" Barrel / 4150 CMV / Med Profile / Nitride
AR-15 300 Blackout 6" Barrel / 4150 CMV / Med Profile / Nitride6" MED PROFILE 1:7 TWIST4150 CMVNITRI..
AR-15 300 Blackout 9" HEAVY BARREL; 4150 CMV 1:7 TWIST
AR-15 300 Blackout 9" HEAVY BARREL; 4150 CMV 1:7 TWIST 9" HEAVY CONTOUR WITH 1:7 TWIST4150 CMV S..
-47%
AR-15 5.56/.223 Right-Handed Side Charging Upper Receiver - No BCG, Billet Aluminum
Upgrade your AR-15 with this Right-Handed Side Charging Upper Receiver, designed to provide a smooth..
-43%
AR-15 5.56/.223 Upper Receiver Build Kit with Black Nitride BCG | Premium Mil-Spec Components
The AR-15 5.56/.223 Upper Receiver Build Kit with Black Nitride BCG is the ultimate solution for any..
AR-15 5.56/.223 WYLDE 16" stainless steel barrel, spiral fluted, 1x8
AR-15 5.56/.223 WYLDE 16" stainless steel barrel, spiral fluted, 1x8. Comes with barrel extension an..
-21%
AR-15 5.56/.223 Wylde 16" stainless steel hbar barrel, straight fluted, 1x8
AR-15 5.56/.223 Wylde 16" stainless steel hbar barrel, straight fluted, 1x8 features: Made from ..
-47%
AR-15 5.56/.223 Wylde 18" 416R Stainless Heavy Barrel - 1:8 Twist, Mid-Length Gas System
The AR-15 5.56/.223 Wylde 18" Heavy Barrel combines precision and durability for superior shooting p..
-28%
AR-15 5.56/.223/300 AAC Complete Bolt Carrier Group - Left Hand
The AR-15 5.56/.223/300 AAC Complete Bolt Carrier Group (Left Hand) is designed for left-handed shoo..
-17%
AR-15 6.5 Grendel II 16" Barrel, 1x8 Twist, Stainless Steel
AR-15 6.5 Grendel II 16" Barrel, 1x8 Twist, Stainless Steel6.5 Grendel Type II416 R Stainless SteelM..
-24%
AR-15 6.5 Grendel II 18" Hbar Barrel, 1x8 Twist, Nitride
AR-15 6.5 Grendel II 18" Barrel, 1x8 Twist, Nitride18" length6.5 Grendel Type II4150 Steel, Black Ni..
-24%
AR-15 6.5 Grendel Type II Bolt Carrier Group – .136 Face Depth | Nitride
Upgrade your AR-15 for 6.5 Grendel Type II with this high-performance bolt carrier group (BCG), engi..