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5.56 NATO AR-15 Upper Builds

Top Sellers

MMC 'Ammophilia V2' 16-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
MMC 'Ammophilia V2' 16-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
$384.99 $289.99
Davidson Defense 'Capture w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
Davidson Defense 'Capture w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
$339.99 $254.99
MMC Armory Exclusive 'Noble Slender' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit - No Handguard
MMC Armory Exclusive 'Noble Slender' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit - No Handguard
$179.99 $134.99
Davidson Defense Jungle Flame 10.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
Davidson Defense Jungle Flame 10.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
$204.99 $154.99
Davidson Defense 'Honest Work' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
Davidson Defense 'Honest Work' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
$269.99 $199.99
Davidson Defense Falas (Suppressor Ready) 16.5-inch AR-15 5.56 NATO Rifle Upper Build Kit
Davidson Defense Falas (Suppressor Ready) 16.5-inch AR-15 5.56 NATO Rifle Upper Build Kit
$214.99 $159.99
Davidson Defense 'Vigilance Wing 5.56 w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
Davidson Defense 'Vigilance Wing 5.56 w/Gauntlet Arms Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
$349.99 $264.99
Davidson Defense Shout of Power 16-inch AR-15 5.56 NATO Rifle Upper Build Kit
Davidson Defense Shout of Power 16-inch AR-15 5.56 NATO Rifle Upper Build Kit
$194.99 $144.99
Davidson Defense 'Full House' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
Davidson Defense 'Full House' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
$169.99 $129.99
Davidson Defense Wallbreaker 16-inch AR-15 5.56 NATO Rifle Full Build Kit
Davidson Defense Wallbreaker 16-inch AR-15 5.56 NATO Rifle Full Build Kit
$359.99 $269.99
Davidson Defense 'Capture' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
Davidson Defense 'Capture' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
$169.99 $129.99
Davidson Defense 'Honest Work' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
Davidson Defense 'Honest Work' 10.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit
$169.99 $129.99
Davidson Defense Nightflare 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
Davidson Defense Nightflare 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
$174.99 $129.99
Davidson Defense 'Vigilance Wing 5.56 w/SBM4 Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
Davidson Defense 'Vigilance Wing 5.56 w/SBM4 Brace' 10.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit
$399.99 $299.99
Davidson Defense 'Full House' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
Davidson Defense 'Full House' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
$264.99 $199.99
Davidson Defense DD-15A4 20-inch AR-15 5.56 NATO Rifle Full Build Kit
Davidson Defense DD-15A4 20-inch AR-15 5.56 NATO Rifle Full Build Kit
$514.99 $389.99

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  • AR-15 80% Upper Build Kits > 5.56 NATO
  • AR-15 Full Build Kits (Everything Minus Lower) > 5.56 NATO
  • AR-15 Complete Upper Build Kits > 5.56 NATO
  • AR-15 Upper Build Kits > 5.56 NATO

Products [363]

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Davidson Defense AR-15
Davidson Defense AR-15"Ace" Pistol Upper Receiver 7.5" 5.56 NATO Stainless 1-7T Barrel 7" M-Lok Handguard + Nitride BCG & Charging Handle (Assembled Only)
$339.99 $254.99 Sale
In Stock
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Davidson Defense AR-15
Davidson Defense AR-15"Axe" Assembled Pistol Upper Receiver 7.5" 5.56 NATO Stainless 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$194.99 $144.99 Sale
In Stock
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MMC Arms
MMC Arms "Rat-Tat-Tat" AR-15 Pistol Featuring Davidson Defense Upper Receiver 7.5" 5.56 NATO 416R Stainless 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$294.99 $224.99 Sale
Out of Stock
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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)
$234.99 $179.99 Sale
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MMC Arms Top Shelf
MMC Arms Top Shelf "Lynx" AR-15 Featuring Davidson Defense Upper Receiver 18" Faxon Firearms 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 17.5" KeyMod ODIN Works Handguard (Assembled or Unassembled)
$494.99 $374.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Fuego" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 9" M-Lok Handguard (Assembled or Unassembled)
$239.99 $184.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Fregata" AR-15 Pistol Upper Receiver 10.5" 5.56 NATO 4150 CMV 1-7T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$209.99 $159.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Giga Wing" AR-15 Pistol Upper Receiver 10.5" 5.56 NATO 4150 CMV 1-8T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$204.99 $154.99 Sale
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Davidson Defense
Davidson Defense "Regiment" AR-15 Pistol Upper Receiver 11.5" 5.56 NATO 4150 CMV 1-7T Barrel Carbine Length Drop-In Handguard (Assembled or Unassembled)
$179.99 $134.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Blade Eagle" AR-15 Upper Receiver 24" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$254.99 $189.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Joust" Side Charging AR-15 Upper Receiver 20" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$444.99 $334.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Themis" AR-15 Upper Receiver 24" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$249.99 $189.99 Sale
Out of Stock
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MMC Top Shelf
MMC Top Shelf "Ironstone" 16.5" AR-15 5.56 Nitride Upper Build Kit W/ Mercury Precision, Unique AR
$474.99 $409.99 Sale
In Stock
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MMC Arms Top Shelf
MMC Arms Top Shelf "Hognose" AR-15 Featuring Aero Precision Upper Receiver 18" Faxon Firearms 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" Unique AR Handguard (Assembled or Unassembled)
$844.99 $634.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Huckleberry" AR-15 Upper Receiver 20" 5.56 NATO 4150 CMV QPQ Nitride 1-9T Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$289.99 $219.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Erebos" AR-15 Upper Receiver 14.5" 5.56 NATO 4150 CMV 1-9T Barrel Carbine Length Drop-In Handguard (Assembled or Unassembled)
$204.99 $154.99 Sale
Out of Stock
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MMC Customs
MMC Customs "Avagaum" AR-15 Pistol Upper Receiver 8.5" 5.56 NATO 4150 CMV 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$189.99 $144.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Wiscasset" AR-15 Upper Receiver 16" 5.56 NATO 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$249.99 $189.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Babaco" AR-15 Pistol Upper Receiver 14.5" 5.56 NATO 4150 CMV 1-7T Barrel Carbine Length Drop-In Handguard (Assembled or Unassembled)
$404.99 $304.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Acerola" AR-15 Upper Receiver 16" 5.56 NATO 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$259.99 $194.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Longan" AR-15 Upper Receiver 16" 5.56 NATO 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$259.99 $194.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Centralia" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV 1-7T Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$319.99 $239.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Mr. Glass" AR-15 Upper Receiver 16.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$449.99 $339.99 Sale
Out of Stock
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MMC Arms Top Shelf
MMC Arms Top Shelf "Fallen" AR-15 Featuring A Davidson Defense Upper Receiver 18" Faxon Firearms 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$424.99 $319.99 Sale
Out of Stock
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