5.56mm Uppers

5.56mm Uppers

AR15 Upper receivers in 556 NATO available in 16", 10.5" and 7.5" lengths for your next build. Check out our AR-15 Uppers in Cerakote colors like FDE and Burnt Bronze. Please keep in mind these are the standard 5.56x45 Nato upper receivers and can use 5.56 or .223 ammo. If you are looking for something a little different than your standard rifle upper make sure you checkout the pistol upper receivers we offer and keep an eye out for new uppers and cerakote colors.

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  • 10.5" 5.56 1:7 Twist Barel Tungsten Gray Milspec Pistol Upper Receiver with 9" MLOK Compatible Hand Guard
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    Grid Defense 10.5" 5.56 Upper Receiver - Tungsten Gray

    Now: $329.00
    Was: $379.00
    Grid Defense 10.5" 5.56 Upper Receiver Finished in Tungsten Gray Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash Hider...
    Now: $329.00
    Was: $379.00
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    Now: $329.00
    Was: $379.00
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  • Mil Spec Grid Defense Blue Titanium Flash Can Upper Receiver with 9" M-Lok Rail and 7.5" 5.56 NATO Barrel. AR15 7.5" 5.56 Flash Can Upper Receiver by Grid Defense in Blue Titanium Cerakote
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    Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Blue Titanium

    Now: $329.00
    Was: $399.00
    Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Blue Titanium  Finished in Blue Titanium Cerakote Made in the USA 1:7 Twist 7.5" 4150 M4 Barrel - Black Nitride 9" Octagon M-Lok Hand Guard Dimpled Flash Can 7075-T6 Mil Spec Upper Receiver...
    Now: $329.00
    Was: $399.00
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    Now: $329.00
    Was: $399.00
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  • AR15 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze Grid Defense Mil-Spec Burnt Bronze AR 15 Upper Receiver with 7.5" 1:7 Twist 5.56 M4 Barrel, 9" M-Lok Rail and Dimpled Flash Can
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    Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze

    Now: $329.00
    Was: $399.00
    Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Mil-spec 7075-T6 5.56 Flash Can Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride 9" Grid Defense Octagon M-Lok Rail Pistol Length Gas System...
    Now: $329.00
    Was: $399.00
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    Now: $329.00
    Was: $399.00
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  • 10.5" Mil Spec Upper Receiver | AR15 Carbine Length Gas System | M-LOK Rail | 5.56 NATO
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    GRID DEFENSE GX2 10.5" 5.56 UPPER RECEIVER - BLACK

    Now: $329.00
    Was: $379.00
    Grid Defense GX2 10.5" 5.56 Upper Receiver Hard Coat Black Anodized Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System 9" Grid Defense GX2...
    Now: $329.00
    Was: $379.00
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    Now: $329.00
    Was: $379.00
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  • AR15 Rifle Upper Receiver | Strike Industries Billet Dust Cover 16" 5.56 NATO | Mil Spec Upper | Periwinkle Cerakote
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    Grid Defense Limited Edition 16" 5.56 NATO Upper with Strike Industries Accessories - Periwinkle/Blue

    $502.85
    Grid Defense 16" 5.56 Upper Receiver - Periwinkle Periwinkle Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper Receiver Strike Industries...
    $502.85
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    $502.85
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  • TUNGSTEN GRAY CERAKOTE | .556 NATO | AR-15 GRID DEFENSE | PISTOL LENGTH GAS SYSTEM | 7" M-LOK HAND GUARD
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    Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver With Free MBUS Sights - Tungsten Gray

    $496.50
    Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Tungsten Gray Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free Float...
    $496.50
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    $496.50
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  • ALWAYS ARMED 7.5" 5.56 NATO COMPLETE UPPER WITH BCG/CHARGING HANDLE - BLACK ANODIZED Most Accurate Black Anodized Pistol Upper Receiver
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    ALWAYS ARMED 7.5" 5.56 NATO COMPLETE UPPER WITH BCG/CHARGING HANDLE - BLACK ANODIZED

    Now: $229.00
    Was: $349.00
    Always Armed 7.5" 5.56 NATO Complete Upper Receiver - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  7.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Pistol Length...
    Now: $229.00
    Was: $349.00
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    Was: $349.00
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  • ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY ALWAYS ARMED 15" FREE FLOAT LIGHTWEIGHT M-LOK BOX RAIL HAND GUARD
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    ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:7  Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length...
    Now: $219.00
    Was: $319.00
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    Was: $319.00
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