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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  • Magpul Flat Dark Earth AR-15 Pistol Upper Receiver Chambered in .300 Blackout (7.62x35) Grid Defense 10.5" Flash Can Upper with 12" MLOK Rail in FDE Cerakote
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - FDE

    Now: $329.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - FDE Finished in Magpul Flat Dark Earth Cerakote Made in the USA 7075-T6 Mil-Spec Flash Can Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7...
    Now: $329.00
    Was: $399.00
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  • flat dark earth cerakote with 10.5" .300 1:8 twist barrel ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL
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    ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL

    Now: $199.00
    Was: $289.00
    ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist Upper Finished in Hard Coat Black Anodize 10.5" 1:8 Twist 4150 Barrel with Black Nitride...
    Now: $199.00
    Was: $289.00
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    Was: $289.00
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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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  • ALWAYS ARMED STAINLESS STEEL 7.5" 300 BLACKOUT UPPER RECEIVER WITH ENHANCED MUZZLE DEVICE
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    ALWAYS ARMED STAINLESS STEEL 7.5" 300 BLACKOUT UPPER RECEIVER WITH ENHANCED MUZZLE DEVICE - BLACK ANODIZED

    $289.00
    ALWAYS ARMED STAINLESS STEEL 7.5" 300 BLACKOUT UPPER RECEIVER WITH ENHANCED MUZZLE DEVICE 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...
    $289.00
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  • ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH 9.25" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE
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    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH 9.25" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE - BLACK ANODIZED

    $309.99
    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH 9.25" 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  10.5" 1:8 Twist 4150 Barrel with Black Nitride...
    $309.99
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    $309.99
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  • AR15 Upper Receiver with 416R Stainless Steel Barrel and AXE Brake
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    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES STAINLESS STEEL UPPER RECEIVER WITH AXE BRAKE - TITANIUM

    $349.00
    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES STAINLESS STEEL UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Stainless Steel Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout Pistol Length...
    $349.00
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    $349.00
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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

    Now: $219.00
    Was: $299.00
    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...
    Now: $219.00
    Was: $299.00
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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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  • Grid Defense 10.5" .300 Blackout AR-15 Pistol Upper Receiver Milspec .300 Blackout Upper Receiver with 12" M-Lok Rail and Dimpled Flash Can
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Black Anodized

    Now: $329.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Black Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec .300 Blackout Flash Can Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout...
    Now: $329.00
    Was: $399.00
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    Now: $329.00
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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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  • 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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  • Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver Burnt Bronze AR15 Pistol Upper Receiver with 12" M-Lok Free Floating Rail
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze

    Now: $329.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Made in the USA 7075-T6 Mil-Spec Burnt Bronze Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7...
    Now: $329.00
    Was: $399.00
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    Was: $399.00
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  • ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - MAGPUL FDE
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    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - MAGPUL FDE

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - MAGPUL 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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  • 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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  • AR15 Upper Receiver Combo | 5.56 NATO | .300 Blackout
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    ALWAYS ARMED 16" UPPER RECEIVER WITH 12" RAIL COMBO DEAL - 5.56 NATO/.300 BLACKOUT

    Now: $395.00
    Was: $558.00
    Always Armed 16" 5.56 NATO Upper Receiver - Black 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: $395.00
    Was: $558.00
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    Now: $395.00
    Was: $558.00
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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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  • 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 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED
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    ALWAYS ARMED 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $269.00
    ALWAYS ARMED 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 BX Series 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: $189.00
    Was: $269.00
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    Now: $189.00
    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
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    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
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    Was: $319.00
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  • AR15 Upper Receiver | .300 Blackout Mil Spec AR-15 Upper Chambered in 7.62x35mm
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    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...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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