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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  • 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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  • 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 System ...
    Now: $458.00
    Was: $658.00
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    Now: $458.00
    Was: $658.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - BURNT BRONZE Get the best made in the usa upper receiver for your next pistol length ar build
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    ALWAYS ARMED 7.5" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Octo Series Upper Receiver - Burnt Bronze 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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  • 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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  • 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" Free...
    Now: $219.00
    Was: $319.00
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    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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    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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    Was: $349.00
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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED SMITH & WESSON RED CERAKOTE | 7.5" .300 BO BARREL
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED 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...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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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: $349.00
    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: $349.00
    Was: $399.00
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    Was: $399.00
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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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    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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    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 OCTO SERIES UPPER RECEIVER - MAGPUL FDE AR-15 Always Armed 16" 300 Blackout Upper Receiver - Magpul FDE
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    ALWAYS ARMED 16" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - FDE

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout OCTO 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...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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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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  • ALWAYS ARMED 7.5" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - MAGPUL FDE Shop this .300 caliber upper for your next suppressed CQB upper
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    ALWAYS ARMED 7.5" 300 BLACKOUT OCTO SERIES UPPER RECEIVER - MAGPUL FDE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout OCTO 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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    Was: $299.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK ANODIZED Shop this upper receiver for your next pistol length suppressed upper build
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    ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $249.00
    Always Armed 7.5" 300 Blackout TR Series Upper Receiver - Black Anodized 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...
    Now: $189.00
    Was: $249.00
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    Was: $249.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE Shop this .300 blackout upper for your next suppressed build
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    ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout TR Series Upper Receiver - Burnt Bronze Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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  • Andro Corp 5" .300 Blackout Upper Receiver - Black Shop this 5" short barreled upper perfect for CQC/CQB and suppressed applications
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    Andro Corp 5" .300 Blackout Upper Receiver - Black

    Now: $350.00
    Was: $415.00
    Andro Corp 5" .300 Blackout Upper Receiver - Black 4150 CMV Melonite 1:7 Twist M4 Feed Ramps Micro Length Gas System .750 Low Profile Gas Block QPQ Corrosion Resistant Finish A2 Flash Hider 5/8x24 Thread Pitch M-LOK Hand Guard 7075 T6...
    Now: $350.00
    Was: $415.00
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    Now: $350.00
    Was: $415.00
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  • Milspec AR 15 Pistol Upper Receiver with 12" MLOK Hand Guard with Dimpled Flash Can Tactical Grape Grid Defense 10.5" .300 Blackout Upper
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Tactical Grape

    Now: $349.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Purple Finished in Purple 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 in .300 Blackout (7.62x35)...
    Now: $349.00
    Was: $399.00
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    Now: $349.00
    Was: $399.00
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  • AR15 Grid Defense 10.5" .300 Blackout Upper Receiver Milspec Burnt Bronze Pistol Upper Receiver by Grid Defense
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    Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze

    Now: $329.00
    Was: $379.00
    Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze Finished in Burnt Bronze 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 Gas...
    Now: $329.00
    Was: $379.00
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    Now: $329.00
    Was: $379.00
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