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  1. Home
  2. AR-15 & AR-10 Build Kits
  3. Upper Builds by Caliber
  4. 5.56 NATO AR-15 Upper Builds

5.56 NATO AR-15 Upper Builds



Top Sellers

DD Customs
DD Customs "Avagaum" AR-15 Pistol Upper Receiver 8.5" 5.56 NATO 4150 CMV 1-7T Barrel 7" M-Lok Handguard
$159.99 Original price $119.99
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
$184.99 Original price $139.99
DD 'Anchor' 16
DD 'Anchor' 16" AR-15 5.56 NATO Stainless Rifle Full Build Kit
$414.99 Original price $309.99
Davidson Defense Medusa's Fury 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat Tubular Handguard Pistol Assembled Upper Receiver
Davidson Defense Medusa's Fury 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat Tubular Handguard Pistol Assembled Upper Receiver
$151.99 Original price $114.99
Davidson Defense Aegis Lightweight 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 15-inch Freefloat M-Lok Handguard Rifle Full Build Kit
Davidson Defense Aegis Lightweight 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 15-inch Freefloat M-Lok Handguard Rifle Full Build Kit
$339.99 Original price $254.99
Davidson Defense 'Avalanche' 16-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
Davidson Defense 'Avalanche' 16-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit
$349.99 Original price $264.99
Warden Duty 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Rifle Full Build Kit
Warden Duty 16-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Keymod Handguard Rifle Full Build Kit
$314.99 Original price $239.99
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
Davidson Defense Aegis 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Complete Upper Build
$254.99 Original price $194.99
Davidson Defense Warden Duty 16-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat Keymod Handguard Rifle Full Build Kit
Davidson Defense Warden Duty 16-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat Keymod Handguard Rifle Full Build Kit
$334.99 Original price $249.99
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
$174.99 Original price $129.99
Davidson Defense Aegis 16-inch Carbine-Gas 1:7 Nitrided 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Full Build Kit
Davidson Defense Aegis 16-inch Carbine-Gas 1:7 Nitrided 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Full Build Kit
$344.99 Original price $259.99
Davidson Defense Attuned 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Quad-Rail Handguard Pistol Upper Build Kit
Davidson Defense Attuned 10.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat Quad-Rail Handguard Pistol Upper Build Kit
$179.99 Original price $134.99

New Releases

Davidson Defense Aurora 16-inch Carbine-Gas 1:8 5.56 NATO AR-15 M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Aurora 16-inch Carbine-Gas 1:8 5.56 NATO AR-15 M-Lok Handguard Rifle Upper Build Kit
$214.99 Original price $159.99
Davidson Defense The Ranger SBR Ready 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense The Ranger SBR Ready 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Free Shipping.
$357.99 Original price $269.99
Davidson Defense The Ranger w/SBA5 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Davidson Defense The Ranger w/SBA5 Brace 10.5-inch 1:8 5.56 NATO AR-15 Drop-In M-Lok Handguard Pistol Full Build Kit
Free Shipping.
$457.99 Original price $344.99
SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Bundle with AR-15 Rubberized Rear Beavertail Grip with Storage Compartment, Black
SB Tactical SBA6 5-Position Adjustable Pistol Stabilizing Brace Bundle with AR-15 Rubberized Rear Beavertail Grip with Storage Compartment, Black
$79.99 Original price $72.99

Products [692]

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Davidson Defense Nightbane 16-inch AR-15 5.56 NATO Rifle Full Build Kit
Davidson Defense Nightbane 16-inch AR-15 5.56 NATO Rifle Full Build Kit
$349.99 $264.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Upper Build Kit Pin/Weld Ready
Davidson Defense Marathon 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Upper Build Kit Pin/Weld Ready
$189.99 $139.99 Sale
In Stock.
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Davidson Defense Marathon 14.5-inch 5.56 NATO AR-15 Pistol Complete Upper Pin/Weld Ready
Davidson Defense Marathon 14.5-inch 5.56 NATO AR-15 Pistol Complete Upper Pin/Weld Ready
$269.99 $204.99 Sale
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Davidson Defense Marathon w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
Davidson Defense Marathon w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
$334.99 $254.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon w/SBA5 Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
Davidson Defense Marathon w/SBA5 Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
$419.99 $314.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon w/Magpul BTR Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
Davidson Defense Marathon w/Magpul BTR Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready
$389.99 $294.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Upper Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
Davidson Defense Marathon 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Upper Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
$199.99 $149.99 Sale
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Davidson Defense Marathon 14.5-inch 5.56 NATO AR-15 Pistol Complete Upper Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
Davidson Defense Marathon 14.5-inch 5.56 NATO AR-15 Pistol Complete Upper Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
$279.99 $209.99 Sale
In Stock.
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Davidson Defense Marathon w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
Davidson Defense Marathon w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
$344.99 $259.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon w/SBA5 Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
Davidson Defense Marathon w/SBA5 Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
$429.99 $324.99 Sale
In Stock. Free Shipping.
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Davidson Defense Marathon w/Magpul BTR Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
Davidson Defense Marathon w/Magpul BTR Brace 14.5-inch Carbine-Gas 5.56 NATO AR-15 Pistol Full Build Kit Pin/Weld Ready with KAK Industry A2 Extended Flash Hider
$399.99 $299.99 Sale
In Stock. Free Shipping.
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Davidson Defense Aegis 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Upper Build Kit
Davidson Defense Aegis 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Upper Build Kit
$194.99 $144.99 Sale
In Stock.
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Davidson Defense Aegis w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
Davidson Defense Aegis w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
$339.99 $259.99 Sale
In Stock. Free Shipping.
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Davidson Defense Aegis w/SBA5 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
Davidson Defense Aegis w/SBA5 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
$424.99 $319.99 Sale
In Stock. Free Shipping.
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Davidson Defense Aegis w/Magpul BTR Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
Davidson Defense Aegis w/Magpul BTR Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 M-LOK Handguard Pistol Full Build Kit
$394.99 $299.99 Sale
In Stock. Free Shipping.
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Davidson Defense Black Horizon 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit
Davidson Defense Black Horizon 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit
$479.99 $364.99 Sale
In Stock. Free Shipping.
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DTT The Opener 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit
DTT The Opener 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Upper Build Kit
$254.99 $194.99 Sale
In Stock.
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DTT The Opener 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Complete Upper Build
DTT The Opener 16.5-inch Mid-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Complete Upper Build
$339.99 $254.99 Sale
In Stock. Free Shipping.
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Cobalt Kinetics 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Pistol Upper Receiver
Cobalt Kinetics 7.5-inch Pistol-Gas 1:7 5.56 NATO AR-15 Pistol Upper Receiver
$634.99 $474.99 Sale
In Stock. Free Shipping.
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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
$274.99 $209.99 Sale
In Stock.
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Davidson Defense Aegis Lightweight w/SBM4 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense Aegis Lightweight w/SBM4 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$369.99 $279.99 Sale
In Stock. Free Shipping.
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Davidson Defense Aegis Lightweight w/SBA5 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense Aegis Lightweight w/SBA5 Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$424.99 $319.99 Sale
In Stock. Free Shipping.
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Davidson Defense Aegis Lightweight 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
Davidson Defense Aegis Lightweight 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit
$194.99 $144.99 Sale
In Stock.
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Davidson Defense Aegis Lightweight w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
Davidson Defense Aegis Lightweight w/Gauntlet Arms Brace 14.5-inch Carbine-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit
$339.99 $259.99 Sale
In Stock. Free Shipping.
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