Upper Assemblies

Moriarti tends to test fire every custom AR-15 upper assembly to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with the U.S. made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds. 

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  • MORIARTI AR-15 300 BLACKOUT PISTOL UPPER ASSEMBLY / 10'' OD GREEN M-LOK / A2
    MORIARTI AR-15 300 BLACKOUT PISTOL UPPER ASSEMBLY / 10'' OD GREEN M-LOK / A2 is a perfect addition to your pistol look. Just drop this pistol upper assembly on your Mil-Spec lower receiver and enjoy the outdoors. Created by MA especially for you, all USA made. BARREL - 10.5" 4150 STEEL M..
    MORIARTI AR-15 300 BLACKOUT PISTOL UPPER ASSEMBLY / 10'' OD GREEN M...
    $289.95$399.95
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  • MORIARTI AR-15 5.56 NATO 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY /TRIPORT / BLACK
    MORIARTI AR-15 5.56 NATO 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY /TRIPORT / BLACKManufacturer:Moriarti ArmamentsCartridge:5.56x45mm NATOOverall Length:27.5 inBarrel Length:16 inBarrel Profile:4150 Chrome Moly SteelGas System Length:Mid LengthBarrel Twist Rate:1-7Threads per Inch:1/2x28Handguard Type..
    MORIARTI AR-15 5.56 NATO 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY /T...
    $289.95$399.95
  • MORIARTI AR-15 5.56 NATO 16" M4 CARBINE DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2 / BLACK
    MORIARTI AR-15 5.56 NATO 16" M4 CARBINE DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2 / BLACK Manufacturer:     Moriarti Armaments Cartridge:             5.56x45mm NATO Overall Length:     27.5 in Ba..
    MORIARTI AR-15 5.56 NATO 16" M4 CARBINE DIAMOND CUT 12" MLOK UPPER ...
    $299.95$399.95
  • MORIARTI AR-74 5.45X39 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2 / BLACK
    MORIARTI AR-74 5.45X39 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2 / BLACK Manufacturer:     Moriarti Armaments Cartridge:             5.45X39 Overall Length:     27.5 in Barrel Length:     16 in Barrel..
    MORIARTI AR-74 5.45X39 16" DIAMOND CUT 12" MLOK UPPER ASSEMBLY / A2...
    $279.95$399.95
  • AR-15 5.56/.223 10.5" Mlok Upper Assembly / Green Accents
    AR-15 5.56/.223 10.5" Mlok Upper Assembly / Green Accents Features:Chamber - 5.56/.223 WYLDEBarrel Twist - 1x7Barrel Thread - 1/2X28Barrel Steel - 4150 Chrome Moly with Nitro-Met coating, CNC machined, M4 feedrampsMuzzle Brake - AR-15 MICRO FLASH CONE IN ANODIZED GREEN ..
    AR-15 5.56/.223 10.5" Mlok Upper Assembly / Green Accents Features:...
    $269.95$449.95
  • MORIARTI AR-15 5.56 NATO 10.5" MLOK UPPER ASSEMBLY / SHROUD / OD GREEN
    MORIARTI AR-15 5.56 NATO 10.5" MLOK UPPER ASSEMBLY / SHROUD / OD GREENAction: Semi-auto Gas System: Carbine Length Gas System Chamber: 5.56 NATO Twist Rate: 1/7 Muzzle Device: Mini Reverse Thread Mini Shroud, 1/2x28 Thread Barrel: 10.5" 5.56 NATO (shoots both, 5.56 and ..
    MORIARTI AR-15 5.56 NATO 10.5" MLOK UPPER ASSEMBLY / SHROUD / OD GR...
    $299.95$449.95