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  1. Home
  2. AR-15 & AR-10 Build Kits
  3. Upper Builds by Caliber
  4. .300 Blackout AR-15 Upper Builds
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.300 Blackout AR-15 Upper Builds

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Top Sellers

Davidson Defense 'Boston' 10.5
Davidson Defense 'Boston' 10.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$264.99 Original price $148.49
Davidson Defense 'Whispering Wind' 16
Davidson Defense 'Whispering Wind' 16"-inch AR-15 .300BLK QPQ Rifle Full Build Kit
$469.99 Original price $265.49
Davidson Defense 'Silo' 16
Davidson Defense 'Silo' 16"-inch AR-15 .300BLK QPQ Rifle Complete Upper Build
$479.99 Original price $215.99
Davidson Defense 'Silent Lightning' 7.5-inch AR-15 .300BLK Phosphate Pistol Upper Build Kit
Davidson Defense 'Silent Lightning' 7.5-inch AR-15 .300BLK Phosphate Pistol Upper Build Kit
$294.99 Original price $134.99
DD 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
DD 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
$349.99 Original price $175.49
Davidson Defense 'Warpick' 7.5-inch AR-15 .300BLK Phosphate Pistol Complete Upper Build
Davidson Defense 'Warpick' 7.5-inch AR-15 .300BLK Phosphate Pistol Complete Upper Build
$429.99 Original price $206.99
DD 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Complete Upper Build Kit
DD 'Lightshow II - Gold .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Complete Upper Build Kit
$474.99 Original price $242.99
Davidson Defense 'Silent Lightning w/SBM4 Brace' 7.5-inch AR-15 .300BLK Phosphate Pistol Full Build Kit
Davidson Defense 'Silent Lightning w/SBM4 Brace' 7.5-inch AR-15 .300BLK Phosphate Pistol Full Build Kit
$619.99 Original price $287.99
Davidson Defense 'Silent Lightning w/Gauntlet Arms Brace' 7.5-inch AR-15 .300BLK Phosphate Pistol Full Build Kit
Davidson Defense 'Silent Lightning w/Gauntlet Arms Brace' 7.5-inch AR-15 .300BLK Phosphate Pistol Full Build Kit
$554.99 Original price $256.49
Davidson Defense 'Treader' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
Davidson Defense 'Treader' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
$379.99 Original price $259.99

New Releases

Davidson Defense 'Hellwing' 16-inch AR-15 10mm Rifle Full Build Kit
Davidson Defense 'Hellwing' 16-inch AR-15 10mm Rifle Full Build Kit
Free Shipping.
$534.99 Original price $334.99
Davidson Defense 'Hellwing' 16-inch AR-15 10mm Rifle Complete Upper Build
Davidson Defense 'Hellwing' 16-inch AR-15 10mm Rifle Complete Upper Build
Free Shipping.
$429.99 Original price $269.99
Davidson Defense 'Flying Dutchman' 16-inch AR-15 10mm Rifle Upper Build Kit
Davidson Defense 'Flying Dutchman' 16-inch AR-15 10mm Rifle Upper Build Kit
$264.99 Original price $164.99
Davidson Defense 'Nightfall Scarab' 16-inch AR-15 10mm Rifle Full Build Kit
Davidson Defense 'Nightfall Scarab' 16-inch AR-15 10mm Rifle Full Build Kit
Free Shipping.
$524.99 Original price $329.99
.300 Blackout AR-15 Upper Builds subcategories
  • 80% Upper Build Kits > .300 Blackout
  • AR-15 Full Build Kits (Everything Minus Lower) > .300 Blackout
  • AR-15 Complete Upper Build Kits > .300 Blackout
  • AR-15 Upper Build Kits > .300 Blackout

Products [120]

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DD 'Lightshow II - Grey .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
DD 'Lightshow II - Grey .300 Blackout' 16-inch AR-15 .300BLK Nitride Rifle Upper Build Kit
$359.99 $175.49 Sale
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Davidson Defense 'Enforcer' 8.5
Davidson Defense 'Enforcer' 8.5" AR-15 .300BLK Nitride KAK Pistol Full Build Kit
$569.99 $292.49 Sale
In Stock. Free Shipping.
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Davidson Defense 'Enforcer' 8.5
Davidson Defense 'Enforcer' 8.5" AR-15 .300BLK Nitride SBA3 Pistol Full Build Kit
$654.99 $337.49 Sale
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Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Upper Build Kit
Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Upper Build Kit
$349.99 $166.49 Sale
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Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Complete Upper Build
Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Complete Upper Build
$474.99 $233.99 Sale
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Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Full Build Kit
Davidson Defense 'Ionic Charge' 16-inch AR-15 .300BLK Phosphate Rifle Full Build Kit
$519.99 $292.49 Sale
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Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Upper Build Kit
Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Upper Build Kit
$334.99 $161.99 Sale
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Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Complete Upper Build
Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Complete Upper Build
$459.99 $229.49 Sale
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Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Full Build Kit
Davidson Defense 'Streamline in .300 Blackout' 16-inch AR-15 .300BLK Phosphate Rifle Full Build Kit
$569.99 $283.49 Sale
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Davidson Defense 'Treader ' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
Davidson Defense 'Treader ' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
$269.99 $184.99 Sale
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Davidson Defense 'Treader' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
Davidson Defense 'Treader' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
$379.99 $259.99 Sale
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Davidson Defense 'Treader w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Treader w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$539.99 $369.99 Sale
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Davidson Defense 'Treader w/SBA3' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Treader w/SBA3' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$589.99 $404.99 Sale
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Davidson Defense 'Treader w/SBA5' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Treader w/SBA5' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$589.99 $404.99 Sale
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Davidson Defense 'Treader w/Gauntlet Arms Brace' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Treader w/Gauntlet Arms Brace' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$489.99 $334.99 Sale
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Davidson Defense 'Spartan Mod 1' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
Davidson Defense 'Spartan Mod 1' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
$264.99 $179.99 Sale
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Davidson Defense 'Spartan Mod 1' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
Davidson Defense 'Spartan Mod 1' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
$374.99 $254.99 Sale
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Davidson Defense 'Spartan Mod 1 w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Spartan Mod 1 w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$539.99 $369.99 Sale
In Stock. Free Shipping.
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Davidson Defense 'Spartan Mod 1 w/SBA3' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Spartan Mod 1 w/SBA3' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$584.99 $399.99 Sale
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Davidson Defense 'Spartan Mod 1 w/SBA5' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Spartan Mod 1 w/SBA5' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$584.99 $399.99 Sale
In Stock. Free Shipping.
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Davidson Defense 'Spartan Mod 1 w/Gauntlet Arms Brace' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Spartan Mod 1 w/Gauntlet Arms Brace' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$484.99 $329.99 Sale
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Davidson Defense 'Bluetooth Hole Puncher' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
Davidson Defense 'Bluetooth Hole Puncher' 8.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
$269.99 $184.99 Sale
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Davidson Defense 'Bluetooth Hole Puncher' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
Davidson Defense 'Bluetooth Hole Puncher' 8.5-inch AR-15 .300BLK Nitride Pistol Complete Upper Build
$379.99 $259.99 Sale
In Stock.
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Davidson Defense 'Bluetooth Hole Puncher w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
Davidson Defense 'Bluetooth Hole Puncher w/SBM4' 8.5-inch AR-15 .300BLK Nitride Pistol Full Build Kit
$539.99 $369.99 Sale
In Stock. Free Shipping.
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218 N State Street Orem UT 84057
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833-496-6401

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