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Shop by Caliber > AR-15 & LR-308/AR-10 Upper Build Kits

Top Sellers

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)
$179.99 $134.99
Omega Mfg. Rear Beavertail grip, Rubberized Coating
Omega Mfg. Rear Beavertail grip, Rubberized Coating
$4.99
Davidson Defense 'G.I. Mod 1' 14.5-inch AR-15 5.56 NATO Phosphate Pistol Upper Build Kit
Davidson Defense 'G.I. Mod 1' 14.5-inch AR-15 5.56 NATO Phosphate Pistol Upper Build Kit
$184.99 $139.99
Davidson Defense 'Meteoric Ore' 7.5-inch AR-15 .300BLK Phosphate Pistol Upper Build Kit
Davidson Defense 'Meteoric Ore' 7.5-inch AR-15 .300BLK Phosphate Pistol Upper Build Kit
$174.99 $134.99
Davidson Defense 'Tumbleweed in .223' 7.5-inch AR-15 .223 Wylde Nitride Pistol Upper Build Kit
Davidson Defense 'Tumbleweed in .223' 7.5-inch AR-15 .223 Wylde Nitride Pistol Upper Build Kit
$169.99 $129.99
Davidson Defense 'Avalanche in .223' 16-inch AR-15 .223 Wylde Phosphate Rifle Upper Build Kit
Davidson Defense 'Avalanche in .223' 16-inch AR-15 .223 Wylde Phosphate Rifle Upper Build Kit
$204.99 $154.99
Davidson Defense 'Compact Quad' 10.5
Davidson Defense 'Compact Quad' 10.5" AR-15 5.56 NATO Nitride Pistol Upper Build Kit
$254.99 $194.99
Preassembled Davidson Defense 'M.A.V. 12 in 5.56' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Preassembled Davidson Defense 'M.A.V. 12 in 5.56' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$249.99 $189.99
Davidson Defense 'Bluegrass' 16
Davidson Defense 'Bluegrass' 16" AR-15 .350 Legend Nitride Rifle Upper Build Kit
$229.99 $174.99
Davidson Defense Nightglass 5-inch AR-15 9MM Pistol Upper Build Kit
Davidson Defense Nightglass 5-inch AR-15 9MM Pistol Upper Build Kit
$149.99 $109.99
MMC 'Rogue Renegade' 16
MMC 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Upper Build Kit
$239.99 $179.99
MMC 'Silver Sentinel' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit
MMC 'Silver Sentinel' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit
$239.99 $184.99
Davidson Defense Fossil Maker in 7.62 16-inch AR-15 7.62x39 Rifle Upper Build Kit
Davidson Defense Fossil Maker in 7.62 16-inch AR-15 7.62x39 Rifle Upper Build Kit
$194.99 $144.99
Davidson Defense 'Reconnaissance' 16-inch AR-15 6.5 Grendel Nitride Rifle Upper Build Kit
Davidson Defense 'Reconnaissance' 16-inch AR-15 6.5 Grendel Nitride Rifle Upper Build Kit
$244.99 $184.99
Davidson Defense 'Ablator w/ Carry Handle' 10.5
Davidson Defense 'Ablator w/ Carry Handle' 10.5" AR-15 5.56 NATO Nitride Pistol Upper Build Kit
$284.99 $214.99
Davidson Defense 'Count' 4.5
Davidson Defense 'Count' 4.5" AR-15 9mm Nitride Pistol Upper Build Kit
$169.99 $129.99

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  • .223 Rem > AR-15 Upper Build Kits
  • 10MM > AR-15 Upper Build Kits
  • 12.7x42 > AR-15 Upper Build Kits
  • 5.56 NATO > AR-15 Upper Build Kit
  • .223 Wylde > AR-15 Upper Build Kits
  • .300 Blackout > AR-15 Upper Build Kits
  • 9mm > AR-15 Upper Build Kits
  • 7.62x39 > AR-15 Upper Build Kits
  • .458 SOCOM > AR-15 Upper Build Kits
  • .350 Legend > AR-15 Upper Build Kits
  • .450 Bushmaster > AR-15 Upper Build Kits
  • 6.5 Grendel > AR-15 Upper Build Kits
  • 6mm ARC > AR-15 Upper Build Kits
  • .308 Winchester > LR-308/AR-10 Upper Build Kits
  • 6.5 Creedmoor > LR-308/AR-10 Upper Build Kits

Products [208]

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Davidson Defense AR-15
Davidson Defense AR-15"Axe" Assembled Pistol Upper Receiver 7.5" 5.56 NATO Stainless 1-7T Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$194.99 $144.99 Sale
In Stock
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MMC Customs
MMC Customs"Scorcher" AR-15 Featuring Aero Precision Upper Receiver 18" Ultra-Match 6.5 Grendel 1-8T Stainless Heavy Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$334.99 $249.99 Sale
Out of Stock
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Omega Mfg. Rear Beavertail grip, Rubberized Coating
Omega Mfg. Rear Beavertail grip, Rubberized Coating
$4.99
In Stock
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MMC Arms Elite Series
MMC Arms Elite Series "Thumper" AR-15 Pistol Featuring Aero Precision Upper Receiver 10.5" .450 Bushmaster 1-24T 4150 CMV Heavy Barrel Premium 10" KeyMod Handguard (Assembled or Unassembled)
$314.99 $234.99 Sale
Out of Stock
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MMC Arms
MMC Arms"Fiery Furnace" AR-15 Featuring Aero Precision Upper Receiver 16" .450 Bushmaster 1-24T 4150 CMV Heavy Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$394.99 $299.99 Sale
Out of Stock
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MMC Arms
MMC Arms"Butch" AR-15 Featuring Aero Precision Upper Receiver 18" Ultra-Match .450 Bushmaster 1-24T 4150 CMV Heavy Barrel 16.5" M-Lok Handguard (Assembled or Unassembled)
$284.99 $214.99 Sale
Out of Stock
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MMC Arms
MMC Arms "Mini Sledge" AR-15 Featuring Aero Precision Upper Receiver 10.5" .450 Bushmaster 1-24T 4150 CMV Heavy Barrel 10" KeyMod Handguard (Assembled or Unassembled)
$299.99 $224.99 Sale
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MMC Arms
MMC Arms "Code Blue" LR-308 Featuring Aero Precision M5 Upper 24" Ultra-Match .308 WIN Stainless 1-10T Straight Fluted Heavy Bull Barrel 19" M-Lok Handguard (Assembled or Unassembled)
$469.99 $354.99 Sale
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MMC Arms
MMC Arms "Solidago" AR-15 Featuring Aero Precision Upper Receiver 16" .458 SOCOM 1-14T 4150 CMV Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$349.99 $264.99 Sale
Out of Stock
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MMC Arms
MMC Arms "Loon" LR-308 Featuring Aero Precision M5 Upper 22" 6.5 Creedmoor 4150 CMV QPQ Nitride 1-8T Barrel 16.5" M-Lok Handguard (Assembled or Unassembled)
$524.99 $394.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Forsaken" AR-15 Upper Receiver 18" .350 Legend 4150 CMV 1-16T Heavy Barrel 13.5" M-Lok Handguard (Assembled or Unassembled)
$354.99 $264.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Coble" AR-15 Upper Receiver 20" .350 Legend 4150 CMV 1-16T Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$324.99 $244.99 Sale
Out of Stock
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MMC Arms
MMC Arms "Ange" LR-308 Featuring Aero Precision M5 Upper 10.5" .308 WIN 4150 CMV QPQ Nitride Heavy Barrel 12" M-Lok Handguard (Assembled or Unassembled)
$354.99 $269.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Sounder" AR-15 Pistol Upper Receiver 8" 9MM 4150 CMV QPQ Nitride 1-10T KAK Industries Barrel 7" KeyMod Handguard (Assembled or Unassembled)
$164.99 $124.99 Sale
Out of Stock
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MMC Arms
MMC Arms "Ladon" LR-308 Featuring Aero Precision M5 Upper 18" 6.5 Creedmoor 416R Stainless 1-8T Straight Fluted Heavy Barrel 16" M-Lok Handguard (Assembled or Unassembled)
$469.99 $349.99 Sale
Out of Stock
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Davidson Defense 'Anthea' 7.5
Davidson Defense 'Anthea' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$194.99 $149.99 Sale
In Stock
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MMC Arms
MMC Arms "Bunting" LR-308 Featuring Aero Precision M5 Upper 18" 6.5 Creedmoor 416R Stainless 1-8T Straight Fluted Heavy Barrel 16" M-Lok Handguard (Assembled or Unassembled)
$469.99 $354.99 Sale
Out of Stock
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MMC Arms Top Shelf
MMC Arms Top Shelf "Cobelodus" AR-15 Featuring Davidson Defense Upper Receiver 16" XX-Treme Barrel Company .350 Legend 4150 CMV 1-16T Barrel 12" Smooth Tube Unique AR Handguard (Assembled or Unassembled)
$434.99 $329.99 Sale
In Stock
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Davidson Defense 'Grimace' 7.5
Davidson Defense 'Grimace' 7.5" AR-15 .300 Blackout Manganese Phosphate Pistol Upper Build Kit
$199.99 $149.99 Sale
In 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)
$234.99 $179.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Crake" AR-15 Pistol Upper Receiver 4.5" .45 ACP 4150 CMV QPQ Nitride 1-16T Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$209.99 $159.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Brant" AR-15 Pistol Upper Receiver 8" .45 ACP 4150 CMV QPQ Nitride Barrel 7" M-Lok Handguard (Assembled or Unassembled)
$259.99 $194.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Antpitta" AR-15 Pistol Upper Receiver 4.5" .45 ACP 4150 CMV 1-16T Barrel 4" M-Lok Handguard (Assembled or Unassembled)
$209.99 $159.99 Sale
Out of Stock
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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)
$494.99 $374.99 Sale
Out of Stock
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