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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  • ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE
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    ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout TR Series Upper Receiver - Burnt Bronze 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...
    Now: $209.00
    Was: $299.00
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    Was: $299.00
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  • ALWAYS ARMED 16" 300 BLACKOUT TR SERIES UPPER RECEIVER - MAGPUL FDE .300 blackout is the best round for medium to large game hunting such as hogs, pigs, and deer
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    ALWAYS ARMED 16" 300 BLACKOUT TR SERIES UPPER RECEIVER - MAGPUL FDE

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout TR Series 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...
    Now: $219.00
    Was: $319.00
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    Was: $319.00
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  • AR-15 16" .300 BLACKOUT UPPER RECEIVER | ALWAYS ARMED MAGPUL FLAT DARK EARTH | AR15 | MIL SPEC UPPER
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    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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  • ALWAYS ARMED LIMITED EDITION 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY
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    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
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    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
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    Now: $219.00
    Was: $269.00
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  • OD Green .300 Blackout AR15 Upper Receiver Milspec Grid Defense 10.5" .300 Blackout Upper Receiver in OD Green
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    Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green

    Now: $329.00
    Was: $379.00
    Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length...
    Now: $329.00
    Was: $379.00
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    Now: $329.00
    Was: $379.00
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  • Grid Defense AR 15 Pistol Upper Receiver Milspec 7.5" .300 AAC Upper Receiver - Black Anodized
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    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
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  • Grid Defense AR15 Pistol Upper Receiver chambered in .300 Blackout Milspec 7.5" .300 Blackout Flash Can Upper Receiver - OD Green
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    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - OD Green

    Now: $349.00
    Was: $399.00
    Grid Defense OD Green .300 Blackout Flash Can Upper Receiver - OD Made in the USA 9" Free Floating M-Lok Rail Finished in OD Green Cerakote Dimpled Flash Can .750 Low Profile Gas Block Pistol Length Gas System  7075-T6 Upper Receiver  7.5" 1:8...
    Now: $349.00
    Was: $399.00
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    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
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    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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  • ALWAYS ARMED 16" .300 Upper Receiver - Magpul OD Green 15" free float m-lok rail
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    ALWAYS ARMED 16" .300 Upper Receiver - OD Green

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED 16" .300 Upper Receiver - Magpul OD Green Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 15" Free Floating MLOK Rail Finished in Magpul OD Green Cerakote Pistol Length Gas System A2 Muzzle Device 1:8 Twist Rate 5/8x24...
    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
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    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
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    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...
    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
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    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
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    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"...
    Now: $219.00
    Was: $319.00
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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
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    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
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    Now: $219.00
    Was: $319.00
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  • 7.5" .300 Blackout Flash Can Upper Receiver | Always Armed Mil Spec Pistol Upper Receiver | Hard Coat Black Anodized Finish
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK

    Now: $299.00
    Was: $349.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  7.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 BLACKOUT Pistol Length Gas System ...
    Now: $299.00
    Was: $349.00
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    Now: $299.00
    Was: $349.00
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  • 10.5" .300 Blackout Upper with 12" Free Floating M-Lok Rail and Dimpled Flash Can Grid Defense Milspec AR-15 Pistol Upper Receiver Finished in Blue Titanium Cerakote
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Blue Titanium

    Now: $329.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7.62x35)...
    Now: $329.00
    Was: $399.00
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    Now: $329.00
    Was: $399.00
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  • Grid Defense AR15 7.5" Upper Receiver with Dimpled Flash Can Blue Titanium .300 Blackout Pistol Upper Receiver by Ghost Firearms
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    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Blue Titanium

    Now: $349.00
    Was: $399.00
    Grid Defense 7.5" .300 Blackout Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Made in the USA Mil-spec 7075-T6 Upper Receiver Chambered in .300 Blackout (7.62x35) 1:8 Twist 4150 Light HBar Barrel - Black Nitride Dimpled Flash Can 9"...
    Now: $349.00
    Was: $399.00
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    Now: $349.00
    Was: $399.00
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  • Tactical Grape .300 Blackout Milspec AR15 Upper Receiver - Grid Defense Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver in Purple cerakote
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    Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Tactical Grape

    Now: $349.00
    Was: $399.00
    Grid Defense 7.5" .300 Blackout Pistol Upper Receiver - Tactical Grape Made in the USA Chambered in .300 Blackout (7.62x35) 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System .750 Low Profile Gas Block Dimpled Flash Can 9"...
    Now: $349.00
    Was: $399.00
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    Now: $349.00
    Was: $399.00
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  • ALWAYS ARMED 16" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - TITANIUM 15" free float handguard
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    ALWAYS ARMED 16" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - TITANIUM

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout OCTO Series Upper Receiver - Titanium 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...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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