300 Blackout Uppers

300 Blackout Uppers

Enhance your AR-15 with premium 300 Blackout upper receivers from Always Armed. Designed for superior performance in rifle and pistol builds, our 300BLK uppers are ideal for subsonic and suppressed shooting. Choose from a variety of Cerakote finishes, barrel lengths, and configurations to match your tactical or custom build. Easy to install, reliable, and ready for the range or field.

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  • Always Armed 10.5" 300 Blackout Upper Receiver - Black Milspec AR-15 10.5" Always Armed Upper with 1:8 Twist
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    ALWAYS ARMED OCTO SERIES 10.5" 300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK ANODIZED

    Now: $219.00
    Was: $279.00
    ALWAYS ARMED OCTO SERIES 10.5" 300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK ANODIZED 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: $219.00
    Was: $279.00
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    Now: $219.00
    Was: $279.00
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  • OCTO Series AR 15 Pistol Upper | Milspec Dust Cover and Forward Assist free float 9.25" M-LOK Hand rail
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    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK Made in the USA Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:8 Twist Barrel with Black Nitride Finish A2...
    Now: $189.00
    Was: $249.00
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    Now: $189.00
    Was: $249.00
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  • ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - FDE This is the best budget sbr upper. Short enough to fit in a backpack while staying effective
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    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - FDE

    Now: $229.00
    Was: $339.00
    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - FDE Finished in FDE Cerakote 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 Gas...
    Now: $229.00
    Was: $339.00
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    Now: $229.00
    Was: $339.00
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  • 16" 1:8 twist barrel ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH 12" RAIL - BLACK
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH 12" RAIL - BLACK

    Now: $199.00
    Was: $269.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH 12" RAIL - BLACK Hard Coat Black Anodized Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist  Pistol Length Gas System 750 Low Profile Gas Block 12" Free Float...
    Now: $199.00
    Was: $269.00
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    Now: $199.00
    Was: $269.00
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  • Always Armed Jester 10.5" Upper Receiver 10.5" 1:8 .300 Blackout Barrel
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    ALWAYS ARMED JESTER 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    ALWAYS ARMED JESTER 10.5" .300 BLACKOUT UPPER RECEIVER Chambered in .300 Blackout Mil-Spec 7075 T6 5.56 Nato Upper Receiver with Dust Cover and Forward Assist  10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Hard Coat Black Anodized...
    Now: $189.00
    Was: $249.00
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    Now: $189.00
    Was: $249.00
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  • Ridgeway Blue AR15 Upper Receiver | .300 Blackout
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    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
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    Now: $219.00
    Was: $319.00
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  • Always Armed 5" .300 Blackout Octo IHS Upper Receiver Always Armed 5" .300 Blackout Octo IHS Upper Receiver
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    Always Armed 5" .300 Blackout Octo IHS Upper Receiver

    $219.00 - $239.00
    Always Armed 5" .300 Octo IHS Upper Receiver Chambered in .300 Blackout 4150 salt bath nitride barrel 5/8x24 TPI thread pitch 1:5 twist rate Micro length gas system Mil-Spec upper receiver Upper machined from 7075 forged aluminum A2 flash hider...
    $219.00 - $239.00
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    $219.00 - $239.00
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  • ALWAYS ARMED 16" .300 BLACKOUT TR UPPER RECEIVER - BLACK Get this .300 blackout upper for your next rifle build
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    ALWAYS ARMED 16" .300 BLACKOUT TR UPPER RECEIVER - BLACK

    Now: $199.00
    Was: $269.00
    ALWAYS ARMED 16" .300 BLACKOUT TR UPPER RECEIVER 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 System .750...
    Now: $199.00
    Was: $269.00
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    Now: $199.00
    Was: $269.00
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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 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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    Now: $209.00
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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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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - BLACK OCTO SERIES 7" FREE FLOAT M-LOK HAND RAIL
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - BLACK 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 Hard Coat...
    Now: $189.00
    Was: $249.00
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    Now: $189.00
    Was: $249.00
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  • AR15 Rifle Upper Receiver with M-LOK Hand Guard
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    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY Made in the USA Mil-Spec 7075 T6 Always Armed Nato 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 Jester 16" .300 Blackout Upper Receiver 16" 1:8 Twist .300 Blackout Barrel
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    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER - BLACK

    $299.00
    ALWAYS ARMED JESTER 16" .300 BLACKOUT UPPER RECEIVER Chambered in .300 Blackout Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 4150 Barrel with Black Nitride Finish Hard Coat Black Anodized Finish Carbine Length...
    $299.00
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    $299.00
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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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    Now: $209.00
    Was: $299.00
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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - TITANIUM TITANIUM | 7.5" .300 BO BARREL
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - TITANIUM

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - TITANIUM 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 Finished in...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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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 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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    Now: $209.00
    Was: $299.00
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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SIG PINK SIG PINK | 7.5" .300 BO BARREL
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SIG PINK 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 Finished in...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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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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    Now: $219.00
    Was: $319.00
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