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5.56 NATO AR-15 Upper Builds

Top Sellers

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
$189.99 $144.99
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 Stainless Steel 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 Stainless Steel 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
$229.99 $174.99
Davidson Defense Spartan Zero 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
Davidson Defense Spartan Zero 7.5-inch AR-15 5.56 NATO Pistol Upper Build Kit
$164.99 $124.99
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 Stainless Steel 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 Stainless Steel 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
$149.99 $109.99
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Assembled Complete Upper Receiver
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Assembled Complete Upper Receiver
$204.99 $154.99
Davidson Defense Aegis w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Assembled Full Build Kit
Davidson Defense Aegis w/Gauntlet Arms Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Assembled Full Build Kit
$269.99 $199.99
Davidson Defense True Blue w/SBA3 Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense True Blue w/SBA3 Brace 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$404.99 $304.99
MMC 'Aethelred V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
MMC 'Aethelred V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$214.99 $164.99
MMC 'Reid V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
MMC 'Reid V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$219.99 $164.99
Davidson Defense Last Impact 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Rifle Assembled Upper Receiver
Davidson Defense Last Impact 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Rifle Assembled Upper Receiver
$174.99 $134.99
Davidson Defense Shadow Protocol 16-inch AR-15 5.56 NATO Rifle Full Build Kit
Davidson Defense Shadow Protocol 16-inch AR-15 5.56 NATO Rifle Full Build Kit
$319.99 $244.99
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 $124.99
Davidson Defense Aegis Lightweight 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper
Davidson Defense Aegis Lightweight 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper
$259.99 $199.99
Davidson Defense 'Shorty Slade' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
Davidson Defense 'Shorty Slade' 10.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build
$264.99 $199.99
Davidson Defense Atriox 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Atriox 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
$164.99 $124.99
Davidson Defense Rapid Drop 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready
Davidson Defense Rapid Drop 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready
$289.99 $219.99

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

Products [476]

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Davidson Defense
Davidson Defense "Zero Motivation" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 416R Stainless 1-7T Barrel 7" Smooth Tube Handguard (Assembled or Unassembled)
$164.99 $124.99 Sale
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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)
$269.99 $204.99 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)
$199.99 $149.99 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)
$424.99 $319.99 Sale
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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)
$194.99 $144.99 Sale
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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)
$194.99 $144.99 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)
$149.99 $114.99 Sale
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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)
$214.99 $159.99 Sale
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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)
$379.99 $289.99 Sale
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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)
$209.99 $159.99 Sale
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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)
$724.99 $544.99 Sale
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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)
$244.99 $184.99 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)
$169.99 $129.99 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)
$159.99 $119.99 Sale
Out of 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)
$344.99 $259.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Midvale" AR-15 Upper Receiver 16" 5.56 NATO 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$219.99 $164.99 Sale
In Stock
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Davidson Defense
Davidson Defense "Leawood" AR-15 Upper Receiver 16" 5.56 NATO 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$244.99 $184.99 Sale
In 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)
$224.99 $169.99 Sale
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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)
$224.99 $169.99 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)
$274.99 $209.99 Sale
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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)
$379.99 $284.99 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)
$369.99 $279.99 Sale
Out of Stock
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Davidson Defense 'Benavidez' 10.5
Davidson Defense 'Benavidez' 10.5" AR-15 5.56 NATO Nitride Drop-In Pistol Full Build Kit
$469.99 $354.99 Sale
In Stock
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Davidson Defense 'Boss Hog' 10.5
Davidson Defense 'Boss Hog' 10.5" AR-15 5.56 NATO Nitride Drop-In Pistol Full Build Kit
$474.99 $354.99 Sale
In Stock
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