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Rifle Length > 5.56 NATO > AR-15 Upper Build Kit

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
Davidson Defense Shout of Power 16-inch AR-15 5.56 NATO Rifle Upper Build Kit
Davidson Defense Shout of Power 16-inch AR-15 5.56 NATO Rifle Upper Build Kit
$194.99 $144.99
Aero Precision AR15 Complete Upper, 16
Aero Precision AR15 Complete Upper, 16" 5.56 Mid-Length Barrel w/ Pinned FSB, MOE Mid-Length - Black
$424.99 $299.99
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
MMC 'Rogue Renegade' 16
MMC 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Upper Build Kit
$239.99 $179.99

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  2. AR-15 & AR-10 Build Kits
  3. Upper Build Kits
  4. Shop by Caliber > AR-15 & LR-308/AR-10 Upper Build Kits
  5. 5.56 NATO > AR-15 Upper Build Kit
  6. Rifle Length > 5.56 NATO > AR-15 Upper Build Kit
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Products [54]

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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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Davidson Defense
Davidson Defense "Blade Eagle" AR-15 Upper Receiver 24" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$254.99 $189.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Joust" Side Charging AR-15 Upper Receiver 20" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$444.99 $334.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Themis" AR-15 Upper Receiver 24" 5.56 NATO 416R Stainless 1-9T Target Crowned Bull Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$249.99 $189.99 Sale
Out of Stock
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MMC Top Shelf
MMC Top Shelf "Ironstone" 16.5" AR-15 5.56 Nitride Upper Build Kit W/ Mercury Precision, Unique AR
$474.99 $409.99 Sale
In Stock
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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)
$844.99 $634.99 Sale
Out of Stock
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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)
$289.99 $219.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Centralia" AR-15 Upper Receiver 16" 5.56 NATO 4150 CMV 1-7T Heavy Barrel 15" M-Lok Handguard (Assembled or Unassembled)
$319.99 $239.99 Sale
In Stock
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MMC Arms Top Shelf
MMC Arms Top Shelf "Fallen" AR-15 Featuring A Davidson Defense Upper Receiver 18" Faxon Firearms 5.56 NATO 4150 CMV QPQ Nitride 1-8T Barrel 15" KeyMod Handguard (Assembled or Unassembled)
$424.99 $319.99 Sale
Out of Stock
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Davidson Defense
Davidson Defense "Santa Fe" 16.5" AR-15 5.56 Nitride Upper Build Kit
$399.99 $249.99 Sale
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MMC 'Frogger V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
MMC 'Frogger V2' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$249.99 $189.99 Sale
In Stock
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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
$224.99 $169.99 Sale
In Stock
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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 Sale
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MMC 'Superflous' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit
MMC 'Superflous' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit
$209.99 $154.99 Sale
In Stock
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Aero Precision AR15 Complete Upper, 16
Aero Precision AR15 Complete Upper, 16" 5.56 Mid-Length Barrel w/ Pinned FSB, MOE Mid-Length - Black
$424.99 $299.99 Sale
In Stock
Add To Cart
Aero Precision AR15 Complete Upper, 20
Aero Precision AR15 Complete Upper, 20" 5.56 w/ Pinned FSB, MOE Handguard - Black
$434.99 $389.99 Sale
In Stock
Add To Cart
MMC 'Rogue Renegade' 16
MMC 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Upper Build Kit
$239.99 $179.99 Sale
In Stock
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Davidson Defense 'Left Handed Mod 1' 16.5-inch AR-15 5.56 NATO Nitride Left-Handed Rifle Upper Build Kit
Davidson Defense 'Left Handed Mod 1' 16.5-inch AR-15 5.56 NATO Nitride Left-Handed Rifle Upper Build Kit
$234.99 $174.99 Sale
In Stock
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Davidson Defense 'M.A.V. 12 in 5.56' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'M.A.V. 12 in 5.56' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$214.99 $159.99 Sale
Out of Stock
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Davidson Defense 'Sky King' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'Sky King' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$619.99 $464.99 Sale
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Davidson Defense 'The Colony' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'The Colony' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$454.99 $344.99 Sale
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Davidson Defense 'XV556' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
Davidson Defense 'XV556' 16.5-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$214.99 $159.99 Sale
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Davidson Defense 'More Perfect Union' 16.5
Davidson Defense 'More Perfect Union' 16.5" AR-15 5.56 NATO Nitride Rifle Upper Build Kit
$459.99 $349.99 Sale
In Stock
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Davidson Defense 'Coat of Arms' 16.5-inch AR-15 5.56 NATO Nitride Side-Charging Rifle Upper Build Kit
Davidson Defense 'Coat of Arms' 16.5-inch AR-15 5.56 NATO Nitride Side-Charging Rifle Upper Build Kit
$639.99 $479.99 Sale
In Stock
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