5.56 NATO AR-15 Upper Builds

Davidson Defense 'More Perfect Union' 16.5" AR-15 5.56 NATO Nitride Rifle Full Build Kit

~~MSRP: $629.99~~ $474.99 Sale

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Davidson Defense 'More Perfect Union' 16.5" AR-15 5.56 NATO Nitride Rifle Complete Upper Build

~~MSRP: $559.99~~ $419.99 Sale

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Davidson Defense 'More Perfect Union' 16.5" AR-15 5.56 NATO Nitride Rifle Upper Build Kit

~~MSRP: $459.99~~ $349.99 Sale

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Davidson Defense 'Coat of Arms' 16.5-inch AR-15 5.56 NATO Nitride Side-Charging Rifle Complete Upper Build

~~MSRP: $754.99~~ $564.99 Sale

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Davidson Defense 'Coat of Arms' 16.5-inch AR-15 5.56 NATO Nitride Side-Charging Rifle Upper Build Kit

~~MSRP: $639.99~~ $479.99 Sale

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DTT 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Full Build Kit

~~MSRP: $404.99~~ $304.99 Sale

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DTT 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Complete Upper Build

~~MSRP: $334.99~~ $249.99 Sale

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DTT 'Rogue Renegade' 16" AR-15 5.56 NATO Stainless Rifle Upper Build Kit

~~MSRP: $239.99~~ $179.99 Sale

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DTT 'Silver Sentinel' 16-inch AR-15 5.56 NATO Stainless Rifle Upper Build Kit

~~MSRP: $239.99~~ $184.99 Sale

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DTT 'Silver Sentinel' 16-inch AR-15 5.56 NATO Stainless Rifle Complete Upper Build

~~MSRP: $339.99~~ $254.99 Sale

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DTT 'Silver Sentinel' 16-inch AR-15 5.56 NATO Stainless Rifle Full Build Kit

~~MSRP: $409.99~~ $309.99 Sale

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Davidson Defense 'Indy 556' 7.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit

~~MSRP: $209.99~~ $159.99 Sale

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Davidson Defense 'Indy 556' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $434.99~~ $324.99 Sale

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Davidson Defense 'Indy 556 w/ KAK' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $409.99~~ $304.99 Sale

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'Nimbus Mist ' 16-inch AR-15 5.56 NATO Nitride Rifle Upper Build Kit

~~MSRP: $259.99~~ $194.99 Sale

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'Nimbus Mist ' 16-inch AR-15 5.56 NATO Nitride Rifle Complete Upper Build

~~MSRP: $354.99~~ $264.99 Sale

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'Nimbus Mist ' 16-inch AR-15 5.56 NATO Nitride Rifle Full Build Kit

~~MSRP: $444.99~~ $334.99 Sale

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'Raven' 7.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit

~~MSRP: $204.99~~ $154.99 Sale

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'Raven' 7.5-inch AR-15 5.56 NATO Nitride Pistol Complete Upper Build

~~MSRP: $299.99~~ $229.99 Sale

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'Raven' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $399.99~~ $304.99 Sale

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'Raven' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $474.99~~ $354.99 Sale

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'Raven' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $424.99~~ $319.99 Sale

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'Sirocco' 7.5-inch AR-15 5.56 NATO Nitride Pistol Upper Build Kit

~~MSRP: $224.99~~ $169.99 Sale

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'Sirocco' 7.5-inch AR-15 5.56 NATO Nitride Pistol Full Build Kit

~~MSRP: $419.99~~ $314.99 Sale

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Here you'll find all the available AR-15 build kits we have chambered in 5.56 NATO.

5.56 80% Upper Build Kits include 80% lower receiver, all the parts needed to finish the lower assembly, and all the parts needed to finish building your upper assembly minus the bolt carrier group and charging handle.

5.56 NATO Full Build Kits come with everything you'd need to completely finish your firearm minus a lower receiver. Add an 80% lower receiver, or have a serialized AR-15 lower receiver shipped to your FFL and you'll have a finished kit.

5.56 NATO Complete Upper Build Kits come with everything to completely finish your upper assembly with a gas block, gas tube, handguard, upper receiver, barrel, bolt carrier group, and charging handle.

Upper Build Kits chambered in 5.56 are offered by popular demand. With an upper build kit, you'll have everything you'll need to build an upper assembly minus the bolt carrier group and charging handle. These kits are great for those who like to have more customizable options using our large selection of bolt carrier groups and charging handles we have in stock.

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5.56 NATO AR-15 Upper Builds