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  • O-MEGA Deals
  1. Home
  2. AR-15 & AR-10 Build Kits
  3. Upper Builds by Caliber

Upper Builds by Caliber

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Top Sellers

AR-15 M4 Charging Handle Mil-Spec Quality
AR-15 M4 Charging Handle Mil-Spec Quality
$19.99 $6.99
Recoil Technologies Micro Low-Profile Gas Block for .750 O.D Barrel Steel
Recoil Technologies Micro Low-Profile Gas Block for .750 O.D Barrel Steel
$16.99 $7.99
Polymer80 PF940C Compact 80% Blank - Black
Polymer80 PF940C Compact 80% Blank - Black
$149.99 $79.99

New Releases

Frame Bundle: SCT Manufacturing Full Frame Assembly + NcSTAR Quick-Release Pistol Flashlight
Frame Bundle: SCT Manufacturing Full Frame Assembly + NcSTAR Quick-Release Pistol Flashlight
$134.99 $89.99
OTD 'King' 9mm Full Pistol Build Kit (Everything Minus Frame) - Glock 19 Compatible
OTD 'King' 9mm Full Pistol Build Kit (Everything Minus Frame) - Glock 19 Compatible
$739.99 $524.99
OTD 'Element 79' 9mm Full Pistol Build Kit (Everything Minus Frame) - Glock 19 Compatible
OTD 'Element 79' 9mm Full Pistol Build Kit (Everything Minus Frame) - Glock 19 Compatible
$519.99 $304.99

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  • $200 - $249.99+
  • .22 Mag AR-15 Upper Builds
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  • .300 Blackout AR-15 Upper Builds
  • 9mm AR-15 Upper Builds
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  • 7.62x39 AR-15 Upper Builds
  • .458 SOCOM AR-15 Upper Builds
  • .450 Bushmaster AR-15 Upper Builds
  • 6.5 Grendel AR-15 Upper Builds
  • 6mm ARC AR-15 Upper Builds
  • .350 Legend AR-15 Upper Builds
  • .308 Winchester LR-308/AR-10 Upper Builds
  • 6.5 Creedmoor LR-308/AR-10 Upper Builds

Products [923]

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OTD Customs
OTD Customs"Halen" LR-308 Featuring Aero Precision M5 Upper 18" Ultra-Match 4150 CMV .308 WIN 1-10T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$569.99 $329.99 Sale
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Davidson Defense
Davidson Defense "Tiger Squirrel" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV 1-7T Barrel 7" KeyMod Handguard (Assembled or Unassembled)
$389.99 $254.99 Sale
In Stock
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OTD Customs “Earthquake” AR-15 Featuring An Anderson Upper Receiver 16” .450 Bushmaster 1-24T 4150 CMV Heavy Barrel 15” M-Lok Handguard (Assembled or Unassembled)
OTD Customs “Earthquake” AR-15 Featuring An Anderson Upper Receiver 16” .450 Bushmaster 1-24T 4150 CMV Heavy Barrel 15” M-Lok Handguard (Assembled or Unassembled)
$789.99 $459.99 Sale
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Davidson Defense
Davidson Defense "Legend" AR-15 Upper Receiver 16" Ultra-Match 350 Legend 4150 CMV 1-16T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$489.99 $299.99 Sale
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Davidson Defense
Davidson Defense "Grackle" AR-15 Pistol Upper Receiver 4" 9MM QPQ Nitride 1-10T KAK Industries Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$444.99 $209.99 Sale
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Omega Customs
Omega Customs "Venom Spider" LR-308 Featuring Aero Precision M5 Upper 16" Ultra-Match .308 WIN Stainless 1-10T Heavy Barrel 12" Smooth Tube Handguard (Assembled or Unassembled)
$619.99 $334.99 Sale
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Davidson Defense
Davidson Defense "Nueve" 4" AR-15 9MM Nitride Pistol Upper Build Kit
$599.99 $349.99 Sale
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Davidson Defense
Davidson Defense "Littleknot" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV 1-8T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$474.99 $284.99 Sale
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Davidson Defense
Davidson Defense "Sallet" AR-15 Upper Receiver 16" .223 Wylde 4150 CMV 1-9T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$454.99 $234.99 Sale
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Davidson Defense
Davidson Defense "Tempt" AR-15 Upper Receiver 16" .223 Wylde 4150 CMV 1-9T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$469.99 $239.99 Sale
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Davidson Defense
Davidson Defense "Gulfstream" AR-15 Pistol Upper Receiver 5.5" 9MM 4150 CMV QPQ Nitride 1-10T Heavy Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$434.99 $184.99 Sale
Out of Stock
Davidson Defense
Davidson Defense "Sunfish" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$444.99 $179.99 Sale
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OTD
OTD "Leatherback" 16.5" AR-15 5.56 Nitride Upper Build Kit
$469.99 $204.99 Sale
Waitlist to be notified - More coming soon!
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Davidson Defense
Davidson Defense "Keen" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$444.99 $179.99 Sale
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Davidson Defense
Davidson Defense "Scaup" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$454.99 $239.99 Sale
Waitlist to be notified - More coming soon!
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Davidson Defense
Davidson Defense "Surd" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$454.99 $219.99 Sale
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Davidson Defense
Davidson Defense "Sprite" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$469.99 $239.99 Sale
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Davidson Defense
Davidson Defense "Craze" AR-15 Upper Receiver 16" 7.62x39 4150 CMV 1-10T Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$479.99 $274.99 Sale
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Davidson Defense
Davidson Defense "Puff" AR-15 Upper Receiver 16" .223 Wylde 4150 CMV 1-9T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$489.99 $234.99 Sale
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Davidson Defense
Davidson Defense "Tributo" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$479.99 $239.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Fire Hawk" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$464.99 $234.99 Sale
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Davidson Defense
Davidson Defense "Lykoi" AR-15 Pistol Upper Receiver 4" 9MM 4150 CMV QPQ Nitride 1-10T KAK Industries Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$459.99 $184.99 Sale
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Davidson Defense
Davidson Defense "Sandstorm" AR-15 Pistol Upper Receiver 7.5" .223 Wylde Phosphate 1-7 T Barrel 7" Premium M-Lok Handguard (Assembled or Unassembled)
$484.99 $264.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Citrine" AR-15 Upper Receiver 16" .350 Legend 4150 CMV 1-16T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$504.99 $304.99 Sale
In Stock
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1 2 3 4 5 6 7 ...39 Next Page View All
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