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 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK Shop this short upper for your next sbr build
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    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK

    Now: $209.00
    Was: $319.00
    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK Hard Coat Black Anodized Finish Milspec 7075-T6 Upper Receiver 6" Black Nitride Barrel 1:7 Twist Rate 5/8x24 TPI Thread Pitch Chambered in .300 Blackout (7.62x35) .750 Low Profile...
    Now: $209.00
    Was: $319.00
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  • AR15 Upper Receiver | .300 Blackout Finished in Smith & Wesson Red Cerakote
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED Made in the USA 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 Barrel with Black Nitride...
    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE 1:7 twist black barrel
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE Finished in Tequila Sunrise 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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  • Always Armed 10.5" .300 Blackout Upper Receiver POW MIA AR15 Pistol Upper Receiver | Mil Spec
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    Always Armed 10.5" .300 Blackout Upper Receiver - Tungsten Gray | POW MIA

    Now: $219.00
    Was: $319.00
    Always Armed 10.5" .300 Blackout Upper Receiver Made in the USA Mil-Spec 7075 T6 Upper Receiver with POW MIA Dust Cover and Forward Assist  10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas System ...
    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED 10.5" STAINLESS STEEL .300 BLACKOUT UPPER RECEIVER - TITANIUM ALWAYS ARMED 10.5" STAINLESS STEEL .300 BLACKOUT UPPER RECEIVER - TITANIUM
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    ALWAYS ARMED 10.5" STAINLESS STEEL .300 BLACKOUT UPPER RECEIVER - TITANIUM

    $319.00
    ALWAYS ARMED 10.5" STAINLESS STEEL .300 BLACKOUT UPPER RECEIVER - TITANIUM Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  10.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout Pistol Length Gas...
    $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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  • 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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  • 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
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    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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  • 16" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE
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    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    $319.00
    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE Made in the USA Mil-Spec 7075 T6 5.56 Nato Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol...
    $319.00
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  • 16" .300 Blackout Upper Receiver with Stainless Steel 1:8 Barrel ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL AND AXE BRAKE - BLACK
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL AND AXE BRAKE - BLACK

    Now: $299.00
    Was: $359.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER Made in the USA Hard Coat Black Anodized Finish Mil-Spec AR15 7075 T6 .300 Blackout Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:8 Twist 416R...
    Now: $299.00
    Was: $359.00
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    Now: $299.00
    Was: $359.00
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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
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    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
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    Now: $259.00
    Was: $329.00
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  • Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver
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    GRID DEFENSE 10.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY

    Now: $329.00
    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: $329.00
    Was: $399.00
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    Now: $329.00
    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
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    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
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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
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    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
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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
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    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 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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    Now: $209.00
    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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    Now: $219.00
    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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    $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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