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  • Top Sellers

Top Sellers

Davidson Defense
Davidson Defense "Choplifter" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$689.99 $374.99
Davidson Defense 'Cavalier' 16
Davidson Defense 'Cavalier' 16" AR-15 5.56 Nitride Full Build Kit
$684.99 $369.99
Davidson Defense
Davidson Defense "Amygdala" 6" AR-15 9mm Pistol Full Build Kit
$754.99 $319.99
Davidson Defense
Davidson Defense "Corncrake" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$704.99 $389.99
Davidson Defense
Davidson Defense "Ural" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$719.99 $404.99
Davidson Defense
Davidson Defense "Guacamole" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$669.99 $354.99
Davidson Defense 'Yugure' 5.25
Davidson Defense 'Yugure' 5.25" AR-15 / AR-9 9MM Nitride Full Build Kit
$694.99 $379.99
Davidson Defense 'Jungo' 16.25
Davidson Defense 'Jungo' 16.25" AR-15 7.62x39 Nitride Rifle Full Build Kit
$714.99 $399.99
Davidson Defense
Davidson Defense "Munson" AR-15 Upper Receiver 16" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$694.99 $379.99
DD 'Fennek' 16.5
DD 'Fennek' 16.5" AR-15 5.56 Full Build Kit
$684.99 $369.99
Davidson Defense
Davidson Defense "Mockingbird" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$709.99 $394.99
DD 'Anchor' 16
DD 'Anchor' 16" AR-15 5.56 NATO Stainless Rifle Full Build Kit
$714.99 $399.99

New Releases

Davidson Defense 'Bubba' 16.5
Davidson Defense 'Bubba' 16.5" AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$554.99 $239.99
Davidson Defense 'Catawampus' 16
Davidson Defense 'Catawampus' 16" AR-15 5.56 NATO Nitride Rifle Complete Upper Build Kit
$644.99 $329.99
Finish Your Build Kit: LR-308 Rifle A2 Buttstock KIT & Buffer Tube Kit + Aero M5 .308 LPK
Finish Your Build Kit: LR-308 Rifle A2 Buttstock KIT & Buffer Tube Kit + Aero M5 .308 LPK
$174.99 $139.99
Finish Your Build Kit: LR-308 Rifle A2 Buttstock KIT & Buffer Tube Kit + .308 Mil-Spec Quality LPK
Finish Your Build Kit: LR-308 Rifle A2 Buttstock KIT & Buffer Tube Kit + .308 Mil-Spec Quality LPK
$139.99 $104.99

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  2. AR-15 & LR-308 Upper Builds
  3. Full Build Kits Under $400

Full Build Kits Under $400

A full build kit for an AR-15 at less than $400? Yep, we have some great options to get you started on your best build yet.

Products [34]

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Davidson Defense 'Cinqudea' 7.5
Davidson Defense 'Cinqudea' 7.5" AR-15 .300BLK Nitride Pistol Full Build Kit
$684.99 $369.99 Sale
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Davidson Defense 'Lightshow II - Grey' 16
Davidson Defense 'Lightshow II - Grey' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$694.99 $379.99 Sale
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Davidson Defense 'Lightshow II - Grey' 16
Davidson Defense 'Lightshow II - Grey' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$679.99 $364.99 Sale
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Davidson Defense 'Lightshow II - Purple' 16
Davidson Defense 'Lightshow II - Purple' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$689.99 $374.99 Sale
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Davidson Defense 'Lightshow II - Purple' 16
Davidson Defense 'Lightshow II - Purple' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$679.99 $364.99 Sale
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Davidson Defense 'Jungo' 16.25
Davidson Defense 'Jungo' 16.25" AR-15 7.62x39 Nitride Rifle Full Build Kit
$714.99 $399.99 Sale
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Davidson Defense 'Pragma' 16.25
Davidson Defense 'Pragma' 16.25" AR-15 7.62x39 Nitride Rifle Full Build Kit
$714.99 $399.99 Sale
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Davidson Defense 'Huxian' 16
Davidson Defense 'Huxian' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$694.99 $379.99 Sale
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Davidson Defense 'Talisman' 16
Davidson Defense 'Talisman' 16" AR-15 5.56 NATO Nitride Rifle Full Build Kit
$679.99 $364.99 Sale
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DD 'Anchor' 16
DD 'Anchor' 16" AR-15 5.56 NATO Stainless Rifle Full Build Kit
$714.99 $399.99 Sale
In Stock.
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Davidson Defense
Davidson Defense "Amygdala" 6" AR-15 9mm Pistol Full Build Kit
$754.99 $319.99 Sale
In Stock.
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Davidson Defense
Davidson Defense "Choplifter" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$689.99 $374.99 Sale
In Stock.
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Davidson Defense
Davidson Defense "Hebridae" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV 1-7T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$694.99 $379.99 Sale
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Davidson Defense
Davidson Defense "Corncrake" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$704.99 $389.99 Sale
In Stock.
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Davidson Defense
Davidson Defense "Mockingbird" AR-15 Pistol Upper Receiver 8.5" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$709.99 $394.99 Sale
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Davidson Defense
Davidson Defense "Partridge" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$674.99 $359.99 Sale
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Davidson Defense
Davidson Defense "Guacamole" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$669.99 $354.99 Sale
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Davidson Defense
Davidson Defense "McCracken" AR-15 Upper Receiver 16.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$694.99 $379.99 Sale
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Davidson Defense
Davidson Defense "Munson" AR-15 Upper Receiver 16" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$694.99 $379.99 Sale
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DD Custom Arms
DD Custom Arms "Coot" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$694.99 $379.99 Sale
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Davidson Defense
Davidson Defense "Ural" AR-15 Pistol Upper Receiver 7.5" 5.56 NATO 4150 CMV QPQ Nitride 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$719.99 $404.99 Sale
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Davidson Defense
Davidson Defense "Larissa" AR-15 Pistol Upper Receiver 4" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$659.99 $344.99 Sale
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Davidson Defense
Davidson Defense "Megara" AR-15 Pistol Upper Receiver 4" 9MM 4150 CMV QPQ Nitride 1-10T Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$644.99 $329.99 Sale
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DD Custom Arms 'Angara' AR-15 Pistol Full Kit Featuring Davidson Defense Upper 9MM 8.5
DD Custom Arms 'Angara' AR-15 Pistol Full Kit Featuring Davidson Defense Upper 9MM 8.5" 4150 CMV QPQ Nitride 1-10T 10" M-Lok Handguard (Assembled or Unassembled)
$684.99 $369.99 Sale
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