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Upper Build Kits

Top Sellers

Davidson Defense 'Electric Dawn' 16.5
Davidson Defense 'Electric Dawn' 16.5" AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$344.99 $224.99
Davidson Defense 'Sawbones' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'Sawbones' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$329.99 $214.99
Davidson Defense 'Projected Power' 4.5-inch AR-15 9mm Nitride Pistol Upper Build Kit
Davidson Defense 'Projected Power' 4.5-inch AR-15 9mm Nitride Pistol Upper Build Kit
$224.99 $144.99
Davidson Defense
Davidson Defense "Caladium" AR-15 Pistol Upper Receiver 8" .45 ACP 4150 CMV QPQ Nitride 1-16T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$269.99 $174.99
Davidson Defense 'Eagle Eye' 8.3-inch AR-15 9mm Nitride Pistol Upper Build Kit
Davidson Defense 'Eagle Eye' 8.3-inch AR-15 9mm Nitride Pistol Upper Build Kit
$259.99 $169.99
Davidson Defense 'Hot Hand Mid-Length' MMC Exclusive 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit (Handguard Ready)
Davidson Defense 'Hot Hand Mid-Length' MMC Exclusive 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit (Handguard Ready)
$269.99 $174.99
Davidson Defense 'MAV9' 11-inch AR-15 9mm Nitride Pistol Upper Build Kit
Davidson Defense 'MAV9' 11-inch AR-15 9mm Nitride Pistol Upper Build Kit
$274.99 $179.99
Davidson Defense 'Rapid Resolution' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'Rapid Resolution' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$299.99 $204.99
Davidson Defense 'XII556' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'XII556' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$284.99 $194.99
Davidson Defense
Davidson Defense "Golden Eagle" AR-15 Upper Receiver 16" .300 Blackout 4150 CMV QPQ Nitride 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$334.99 $219.99
Davidson Defense 'Hot Scream' 10.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
Davidson Defense 'Hot Scream' 10.5-inch AR-15 .300BLK Nitride Pistol Upper Build Kit
$319.99 $209.99
'Nebula' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit - PREASSEMBLED
'Nebula' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit - PREASSEMBLED
$359.99 $234.99
Davidson Defense 'Guardian Prime' 5.5
Davidson Defense 'Guardian Prime' 5.5"-inch AR-15 9mm QPQ Pistol Complete Upper Build
$414.99 $269.99
Davidson Defense 'M.A.V. 10 in 5.56' 10.5-inch AR-15 5.56 NATO Phosphate Pistol Upper Build Kit
Davidson Defense 'M.A.V. 10 in 5.56' 10.5-inch AR-15 5.56 NATO Phosphate Pistol Upper Build Kit
$244.99 $164.99
Davidson Defense 'M.A.V. 10 in 7.62' 10.5-inch AR-15 7.62x39 Phosphate Pistol Upper Build Kit
Davidson Defense 'M.A.V. 10 in 7.62' 10.5-inch AR-15 7.62x39 Phosphate Pistol Upper Build Kit
$254.99 $174.99
Davidson Defense 'Top Gunner' 8.3-inch AR-15 9mm Nitride Pistol Upper Build Kit
Davidson Defense 'Top Gunner' 8.3-inch AR-15 9mm Nitride Pistol Upper Build Kit
$259.99 $169.99

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Products [495]

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MMC Arms
MMC Arms "Aquanox" AR-15 Featuring Aero Precision Upper Receiver 16" .350 Legend 4150 CMV QPQ Nitride Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$519.99 $274.99 Sale
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Davidson Defense
Davidson Defense "Bulletstorm" AR-15 Upper Receiver 16" .350 Legend 4150 CMV QPQ Nitride 1-16T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$514.99 $249.99 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)
$809.99 $559.99 Sale
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Davidson Defense
Davidson Defense "Racer" AR-15 Upper Receiver 16" .350 Legend 4150 CMV QPQ Nitride 1-16T Barrel 13" M-Lok Handguard (Assembled or Unassembled)
$519.99 $239.99 Sale
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Davidson Defense
Davidson Defense "Battlantis" AR-15 Upper Receiver 16" .350 Legend 4150 CMV QPQ Nitride 1-16T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$524.99 $249.99 Sale
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Davidson Defense 'Granite' 16
Davidson Defense 'Granite' 16" AR-15 .300 Blackout Manganese Phosphate Upper Build Kit
$519.99 $204.99 Sale
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Davidson Defense
Davidson Defense "Boracite" Side Charging AR-15 Pistol Upper Receiver 8.5" .300 Blackout 4150 CMV 1-8T Barrel 9" M-Lok Handguard (Assembled or Unassembled)
$509.99 $364.99 Sale
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MMC Customs
MMC Customs "Targ" LR-308 Featuring Aero Precision M5 Upper 24" 6.5 Creedmoor 416R Stainless 1-8T Straight Fluted Heavy Bull Barrel 16" KeyMod Handguard (Assembled or Unassembled)
$589.99 $329.99 Sale
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Davidson Defense
Davidson Defense "Fluorite" 4" AR-15 9MM Nitride Pistol Upper Build Kit
$454.99 $204.99 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)
$534.99 $264.99 Sale
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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)
$489.99 $214.99 Sale
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Davidson Defense
Davidson Defense "Linaria" AR-15 Upper Receiver 16" 7.62x39 4150 CMV 1-10T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$534.99 $264.99 Sale
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Davidson Defense
Davidson Defense "Lunaria" AR-15 Upper Receiver 16" 7.62x39 4150 CMV 1-10T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$534.99 $259.99 Sale
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Davidson Defense
Davidson Defense "Lupinus" AR-15 Upper Receiver 16" 7.62x39 4150 CMV 1-10T Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$534.99 $259.99 Sale
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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)
$514.99 $254.99 Sale
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Davidson Defense
Davidson Defense "Quince" AR-15 Pistol Upper Receiver 7.5" 7.62x39 4150 CMV 1-10T Heavy Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$524.99 $249.99 Sale
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MMC Arms Top Shelf
MMC Arms Top Shelf "Betony" LR-308 Featuring Aero Precision Upper Receiver 18.75" Ballistic Advantage .308 WIN 4150 CMV QPQ Nitride 1-10T Barrel 15" KeyMod AIM Sports Handguard (Assembled or Unassembled)
$709.99 $389.99 Sale
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Davidson Defense
Davidson Defense "Idared" AR-15 Pistol Upper Receiver 10.5" .300 Blackout 4150 CMV 1-8T Heavy Barrel 10" M-Lok Handguard (Assembled or Unassembled)
$559.99 $264.99 Sale
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Davidson Defense
Davidson Defense "Aitne" AR-15 Upper Receiver 20" 6.5 Grendel 416R Stainless 1-8T Straight Fluted Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$574.99 $269.99 Sale
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Davidson Defense
Davidson Defense "Biddleford" AR-15 Upper Receiver 18" 6.5 Grendel 4150 CMV 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$584.99 $279.99 Sale
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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)
$624.99 $319.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Boru" AR-15 Upper Receiver 16" 6.5 Grendel 416R Stainless 1-8T Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$584.99 $279.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Arx" AR-15 Upper Receiver 16" 6.5 Grendel 416R Stainless 1-8T Barrel 12.5" Quad Rail Handguard (Assembled or Unassembled)
$579.99 $264.99 Sale
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Davidson Defense
Davidson Defense "Darkwatch" 4" AR-15 9MM Nitride Upper Build Kit
$519.99 $204.99 Sale
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