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 7.5" 300 Blackout AR-15 Upper Receiver Mil-Spec AR 15 7.5" Pistol Upper Receiver with 1:8 Twist 4150 Steel Barrel - Ridgeway Blue
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Ridgeway Blue 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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    Was: $299.00
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  • Always Armed 10.5" 300 Blackout 1:8 Twist Upper Receiver AR 15 Mil-spec 10.5" Pistol Upper Receiver Chambered in 7.62x35 - Bazooka Green Finish
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    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Bazooka Green 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 Length Gas...
    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 Upper Receiver 16" .300 Blackout Rifle Upper Receiver - Ridgeway Blue Cerakote Finish
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout Upper Receiver - Ridgeway Blue 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 ...
    Now: $219.00
    Was: $319.00
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    Was: $319.00
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  • 16" .300 Blackout Upper Receiver with Stainless Steel Barrel | AR15
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    Always Armed 16" .300 Blackout Upper Receiver with Stainless Steel Barrel, AXE Brake and 12" M-Lok Rail - Black Anodized

    $349.00
    Always Armed 16" .300 Blackout Upper Receiver Black Anodized Finish Chambered in .300 Blackout 12" Aluminum M-LOK Hand Guard 16" 1:8 416R Stainless Steel Barrel Pistol Length Gas System Stainless Steel AXE Brake Mil-Spec 7075-T6 Upper Receiver
    $349.00
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    $349.00
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  • ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE OCTO Series AR 15 Pistol Upper | Milspec Dust Cover and Forward Assist
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    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish 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...
    Now: $209.00
    Was: $299.00
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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 7.5" Upper Receiver Chambered in .300 Blackout Mil Spec 7.5" 1:8 Twist .300 Pistol Upper Receiver - Bazooka Green
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Bazooka Green 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 Gas...
    Now: $209.00
    Was: $299.00
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    Was: $299.00
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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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  • Always Armed 10.5" 300 Blackout Upper Receiver with 10" Hand Guard 10.5" 7.62x35 Pistol Upper Receiver - Sig Pink Cerakote
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    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Sig Pink 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 Length Gas...
    Now: $209.00
    Was: $299.00
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  • Sig Pink 16" Upper Receiver Chambered in 7.62x35 Always Armed 16" .300 Blackout Upper Receiver with 15" MLOK Rail
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout Upper Receiver - Sig Pink 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: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED 6" 300 BLACKOUT UPPER RECEIVER - BLACK This stubby .300 Blackout upper is the way to start your next CQB CQC suppressed build
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    ALWAYS ARMED 6" 300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    Always Armed 6" 300 Blackout Upper Receiver - Black Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  6" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas System ...
    Now: $189.00
    Was: $249.00
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    Now: $189.00
    Was: $249.00
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  • ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE 10.5" 1:8 twist 4150 steel barrel
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    ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK TR Series Rail 10.5" 1:8 Twist Barrel with...
    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 BX SERIES UPPER RECEIVER
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    ALWAYS ARMED 10.5" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $249.00
    ALWAYS ARMED 10.5" .300 BLACKOUT BX SERIES 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 Blackout Pistol...
    Now: $189.00
    Was: $249.00
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    Was: $249.00
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  • Milspec AR-15 OD Green Upper Receiver Chambered in .300 Blackout Grid Defense Pistol Upper with 10.5" 1:8 Barrel, 12" M-Lok Rail and Dimpled Flash Can - Magpul Olive Drab Green
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    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - OD Green

    Now: $329.00
    Was: $399.00
    Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Made in the USA 7075-T6 Mil-Spec 10.5" .300 Blackout Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in ...
    Now: $329.00
    Was: $399.00
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    Now: $329.00
    Was: $399.00
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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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  • Cerakoted Always Armed 7.5" .300 Blackout Upper Receiver with 7" Rail Mil-Spec AR 15 Upper Receiver Chambered in 7.62x35 - Sig Pink
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Sig Pink 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 Gas System ...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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  • ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT AR15 MIL SPEC UPPER RECEIVER - BURNT BRONZE
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    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 10.5" .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 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:8 Twist...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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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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    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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    Now: $199.00
    Was: $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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