300BLK Uppers

300BLK Uppers

300Blk uppers for AR15 in a wide range of Cerakote colors like FDE and OD Green are available from Always Armed. 300 BLK AR uppers are the top choice for your next hunting AR15. Using the standard 5.56 bolt carrier group, the .300 Blackout uppers are the go to pick when AR builders are looking for a new caliber in their AR-15 as they can be easily swapped out on existing AR lowers.

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  • Ghost Firearms 16" .300 Blackout Upper Receiver in Blue Titanium Cerakote Cerakoted Blue Titanium 16" .300 Blackout Upper Receiver by Ghost Firearms

    Ghost Elite 16" Upper .300 AAC Blackout - Blue Titanium

    Now: $259.00
    Was: $329.00
    GHOST ELITE 16" UPPER - .300 AAC BLACKOUT UPPER - BLUE TITANIUM Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System  Ghost 14" M-Lok Free Float Hand...
    Now: $259.00
    Was: $329.00
    Qty in Cart: 0
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    Now: $259.00
    Was: $329.00
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  • Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver

    GRID DEFENSE 10.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY

    Now: $349.00
    Was: $399.00
     GRID DEFENSE 10.5" .300 BLACKOUT DIMPLED FLASH CAN UPPER TUNGSTEN GRAY  Finished in Tungsten Gray Cerakote Made in the USA 7075-T6 Mil-Spec .300 Blackout Upper Receiver 10.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride Chambered...
    Now: $349.00
    Was: $399.00
    Qty in Cart: 0
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    Now: $349.00
    Was: $399.00
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  • Grid Defense AR15 7.5" .300 Blackout Flash Can Upper Receiver in Burnt Bronze Milspec AR-15 Pistol Upper Receiver by Grid Defense

    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze

    Now: $349.00
    Was: $399.00
    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze Made in the USA Chambered in .300 Blackout (7.62x35) Dimpled Flash Can  Pistol Length Gas System 9" Grid Defense Octagon M-Lok Rail 7.5" 1:8 Twist 4150 Light HBar Barrel -...
    Now: $349.00
    Was: $399.00
    Qty in Cart: 0
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    Now: $349.00
    Was: $399.00
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  • Milspec AR15 Pistol Upper Receiver finished in Magpul FDE Grid Defense AR 15 .300 Blackout Flash Can Upper Receiver

    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - FDE

    Now: $349.00
    Was: $399.00
    Grid Defense 7.5" .300 Blackout Pistol Upper Receiver - Flat Dark Earth Chambered in .300 Blackout 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride 7075-T6 Milspec Upper Receiver Pistol Length Gas System  .750 Low Profile Gas Block Dimpled...
    Now: $349.00
    Was: $399.00
    Qty in Cart: 0
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    Now: $349.00
    Was: $399.00
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  • ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK ANODIZED Shop this black upper receiver for your next ar-15 .300 blackout diy build

    ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    Always Armed 10.5" 300 Blackout TR Series Upper Receiver - Black Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol...
    Now: $189.00
    Was: $249.00
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    Now: $189.00
    Was: $249.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - MAGPUL FDE Shop this upper for your next suppressed .300 blackout build. the best upper for sub sonic shooting

    ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - MAGPUL FDE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout TR Series Upper Receiver - Magpul FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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  • AR-15 16" .300 BLACKOUT UPPER RECEIVER | ALWAYS ARMED MAGPUL FLAT DARK EARTH | AR15 | MIL SPEC UPPER

    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER - FDE

    $319.00
    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:8  Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...
    $319.00
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    $319.00
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  • ALWAYS ARMED LIMITED EDITION 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY

    ALWAYS ARMED LIMITED EDITION 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY

    $319.00
    ALWAYS ARMED LIMITED EDITION 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY Finished in Tungsten Gray Cerakote Milspec 7075-T6 Upper Receiver 7.5" Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) .750 Low Profile Gas Block Pistol...
    $319.00
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    $319.00
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  • ALWAYS ARMED OCT2 SERIES 16" .300 BLACKOUT UPPER RECEIVER - BLACK Mil Spec AR15 Rifle Upper Receiver with M-LOK Free Float Rail

    ALWAYS ARMED OCT2 SERIES 16" .300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $219.00
    Was: $269.00
    ALWAYS ARMED OCT2 SERIES 16" .300 BLACKOUT UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 4150 Barrel with Black Nitride Finish 5/8x24 TPI Thread Pitch Chambered in ...
    Now: $219.00
    Was: $269.00
    Qty in Cart: 0
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    Now: $219.00
    Was: $269.00
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  • ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT This is the perfect upper for your next .300 blackout build

    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE Made in the USA Burnt Bronze Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:8 Twist...
    Now: $219.00
    Was: $319.00
    Qty in Cart: 0
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    Now: $219.00
    Was: $319.00
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  • Ridgeway Blue AR15 Upper Receiver | .300 Blackout

    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE Made in the USA Ridgeway Blue Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:7 Twist Barrel...
    Now: $219.00
    Was: $319.00
    Qty in Cart: 0
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    Now: $219.00
    Was: $319.00
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  • AR15 Upper Receiver | .300 Blackout Mil Spec AR-15 Upper Chambered in 7.62x35mm

    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY Finished in Tungsten Gray Cerakote Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist  Pistol Length Gas System 750 Low Profile Gas Block 15" Free Float...
    Now: $219.00
    Was: $319.00
    Qty in Cart: 0
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    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE RIDGEWAY BLUE | 7.5" .300 BO BARREL

    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7" Free Float M-LOK OCTO Series Rail 7.5" 1:8 Twist Barrel with Black Nitride Finish A2 Flash Hider...
    Now: $209.00
    Was: $299.00
    Qty in Cart: 0
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    Now: $209.00
    Was: $299.00
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  • Grid Defense AR 15 Pistol Upper Receiver Milspec 7.5" .300 AAC Upper Receiver - Black Anodized

    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Black Anodized

    Now: $349.00
    Was: $399.00
    Grid Defense 7.5" .300 Blackout Flash Can Upper - Black Made in the USA Pistol Length Gas System Dimpled Flash Can 9" Grid Defense Octagon M-Lok Rail Chambered in .300 Blackout (7.62x35) 1:8 Twist 4150 Light HBar Barrel - Black Nitride Mil-Spec 7075-T6...
    Now: $349.00
    Was: $399.00
    Qty in Cart: 0
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    Now: $349.00
    Was: $399.00
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  • ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN 5/8x24 TPI Thread Pitch | Finished in Zombie Green

    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN

    Now: $219.00
    Was: $319.00
    Always Armed 16" .300 Blackout Upper Receiver - Zombie Green Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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  • UPPER RECEIVER WITH 15" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE

    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER WITH 15" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE - BLACK ANODIZED

    $329.00
    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER WITH 15" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 4150 Barrel with Black Nitride Finish...
    $329.00
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    $329.00
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  • ALWAYS ARMED 16" JESTER UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT - FDE

    ALWAYS ARMED 16" JESTER UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT - FDE

    Now: $458.00
    Was: $658.00
    Always Armed 16" 5.56 NATO Jester Upper Receiver - FDE 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 Gas System ...
    Now: $458.00
    Was: $658.00
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    Now: $458.00
    Was: $658.00
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  • ALWAYS ARMED JESTER 7.5" FLASH CAN UPPER RECEIVER 7.5" .300 BLACKOUT 1:8 TWIST BARREL

    ALWAYS ARMED JESTER 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK

    $299.00
    ALWAYS ARMED JESTER 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH 9" MLOK RAIL - BLACK Mil-Spec AR15 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Flash Can Muzzle Device Hard Coat Black...
    $299.00
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    $299.00
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  • ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - PINK CHAMPAGNE ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - PINK CHAMPAGNE

    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - PINK CHAMPAGNE

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - PINK CHAMPAGNE Finished in Pink Champagne Cerakote Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist  Pistol Length Gas System 750 Low Profile Gas Block 15" Free...
    Now: $219.00
    Was: $319.00
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    Qty in Cart: 0
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    Now: $219.00
    Was: $319.00
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  • 16" 1:7 Twist .300 Barrel Finished in Sig Pink Cerakote

    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 Blackout UPPER RECEIVER - SIG PINK Made in the USA Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist  Carbine Length Gas System 750 Low Profile Gas Block 15" Free Float M-LOK OCTO Series Rail...
    Now: $219.00
    Was: $319.00
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
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