300BLK Uppers

300BLK 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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  • 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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  • 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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    Was: $269.00
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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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    Now: $199.00
    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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    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

    $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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  • 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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  • 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
    Was: $399.00
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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
    Was: $319.00
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  • ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BURNT BRONZE This is the best option for a budget cqc gun boasting plenty of stopping power.
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    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BURNT BRONZE

    Now: $229.00
    Was: $339.00
    ALWAYS ARMED 6" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BURNT BRONZE Finished in Burnt Bronze 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...
    Now: $229.00
    Was: $339.00
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    Now: $229.00
    Was: $339.00
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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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  • 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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    Now: $329.00
    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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    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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    Now: $189.00
    Was: $249.00
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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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    Now: $219.00
    Was: $319.00
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