Upper Assemblies

Find an exquisite selection of US made 6.8 SPC Upper Assemblies. All Moriarti Arms ® upper receiver assemblies are function-tested and ready to fire.

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  • AR-15 6.8 SPC 24" stainless steel tactical bull upper assembly, fluted
    AR-15 6.8 SPC 24" stainless steel tactical bull upper assembly, fluted is a perfect addition to AR-15 Rifle family long range target shooting. Assembly features:Barrel - 24" 416R stainless steel bull barrel. Hardened to 26-32 rc and stress relieved.  Chambered in 6.8 SPC Type 2. 1-10 rh tw..
    AR-15 6.8 SPC 24" stainless steel tactical bull upper assembly, flu...
    $299.95$499.95
  • AR-15 6.8 SPCII 10.5" M4 pistol upper assembly w/Mlok rail
    AR-15 6.8 SPCII 10.5" M4 pistol upper assembly w/Mlok rail is for a Military/Tactical shooter. This is the most economical way to upgrade your standard AR-15 rifle with the 6.8 SPC modified caliber. This kit contains all components to complete your new AR-15 project.  Barrel: 10.5"..
    AR-15 6.8 SPCII 10.5" M4 pistol upper assembly w/Mlok rail is ...
    $289.95$499.95
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  • AR-15 6.8 SPCII 16" Chrome Moly Upper Assembly in Blue
    AR-15 6.8 SPCII 16" Chrome Moly Upper Assembly in BlueBarrel - 16" DPMS 6.8 SPC II M4 style chrome lined barrel, 1/2 x 36 Threaded, 1x10 twist, Chrome Moly 4140, Phosphate Finish, Carbine Length Gas System, M4 Feed Ramps. Comes with anodized steel Muzzle Brake. ..
    AR-15 6.8 SPCII 16" Chrome Moly Upper Assembly in BlueBarrel -...
    $299.95$449.95
  • AR-15 6.8 SPCII 16" M4 CMV Keymod Upper Assembly
    AR-15 6.8 SPCII 16" M4 CMV Upper Assembly Features:Barrel - 16" M4 CMV barrel, 1/2 x 36 Threaded, 1x10 twist, Chrome Moly 4140, Non - Fluted, Phosphate Finish, Carbine Length Gas System, M4 Feed Ramps. Barrel is finished off with A2 Birdcage compensator. ..
    AR-15 6.8 SPCII 16" M4 CMV Upper Assembly Features:Barrel - 16...
    $249.95$329.95