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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  • 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

    Now: $219.00
    Was: $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...
    Now: $219.00
    Was: $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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  • ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED
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    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $279.00
    Always Armed 10.5" 300 Blackout 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 Length Gas...
    Now: $189.00
    Was: $279.00
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    UPPER RECEIVER WITH 15" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER WITH 15" RAIL, ADJUSTABLE GAS BLOCK AND ENHANCED SS MUZZLE DEVICE - BLACK ANODIZED

    $329.00
    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER WITH 15" 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  16" 1:8 Twist 4150 Barrel with Black Nitride...
    $329.00
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    $329.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $269.00
    ALWAYS ARMED 7.5" 300 BLACKOUT 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 Blackout Pistol Length Gas...
    Now: $189.00
    Was: $269.00
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    Was: $269.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout 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 Gas System .750...
    Now: $209.00
    Was: $299.00
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  • ALWAYS ARMED JESTER 7.5" FLASH CAN UPPER RECEIVER 7.5" .300 BLACKOUT 1:8 TWIST BARREL
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    ALWAYS ARMED JESTER 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK

    Now: $209.00
    Was: $309.00
    ALWAYS ARMED JESTER 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH 9" MLOK RAIL - BLACK Mil-Spec AR15 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Flash Can Muzzle Device Hard Coat Black...
    Now: $209.00
    Was: $309.00
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    Was: $309.00
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  • 16" 1:7 Twist .300 Barrel Finished in Sig Pink Cerakote
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - SIG PINK

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 Blackout UPPER RECEIVER - SIG PINK Made in the USA Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist  Carbine Length Gas System 750 Low Profile Gas Block 15" Free Float M-LOK OCTO Series...
    Now: $219.00
    Was: $319.00
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  • Out of stock
    16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard 16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard
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    16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard

    $299.00
    16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard  Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 15" Free Floating Key Mod Hand Guard Black Anodized Finish Pistol Length Gas System A2 Muzzle Device
    $299.00
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  • 7.5" .300 Blackout Flash Can Upper Receiver With 10" MLOK Hand Guard 7.5" .300 Blackout Flash Can Upper Receiver With 10" MLOK Hand Guard
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    7.5" .300 Blackout Flash Can Upper Receiver With 10" MLOK Hand Guard

    $299.00
    7.5" .300 Blackout Flash Can Upper Receiver With 10" MLOK Hand Guard  Made in the USA Mil Spec 7075 T6 Upper Receiver 7.5" 4150 Steel Barrel with Black Nitride Finish Chambered in .300 Blackout 1:8 Twist Rate 10" Free Floating MLOK Hand...
    $299.00
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  • Out of stock
    ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL 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: $299.00
    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...
    Now: $199.00
    Was: $299.00
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  • Out of stock
    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES STAINLESS STEEL UPPER RECEIVER WITH AXE BRAKE - TITANIUM
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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 Upper Receiver with Dust Cover and Forward Assist  16" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout Pistol Length Gas...
    $349.00
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    $349.00
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  • ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK
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    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK

    Now: $199.00
    Was: $299.00
    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES 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 Chambered in .300 Blackout Pistol Length Gas...
    Now: $199.00
    Was: $299.00
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  • ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - SMITH & WESSON RED
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    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - SMITH & WESSON RED

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - SMITH & WESSON RED 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...
    Now: $219.00
    Was: $319.00
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  • Always Armed 16" .300 Blackout TR Series Upper Receiver - Black Always Armed 16" .300 Blackout TR Series Upper Receiver - Black
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    Always Armed 16" .300 Blackout TR Series Upper Receiver - Black

    Now: $199.00
    Was: $299.00
    Always Armed 16" .300 Blackout TR Series Upper Receiver - Black Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 1:8 Twist 15" TR Series Free Floating M-LOK Hand Guard Black Anodized Finish Pistol Length Gas System .750 Low Profile Gas Block...
    Now: $199.00
    Was: $299.00
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  • Out of stock
    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER WITH 15" M-LOK QUAD RAIL ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER WITH 15" M-LOK QUAD RAIL
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    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER WITH 15" M-LOK QUAD RAIL

    Now: $219.00
    Was: $329.00
    ALWAYS ARMED 16" .300 BLACKOUT UPPER RECEIVER WITH 15" M-LOK QUAD RAIL Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 15" Free Floating MLOK Quad Rail Black Anodized Finish Pistol Length Gas System A2 Muzzle Device 1:8 Twist Rate BCG and...
    Now: $219.00
    Was: $329.00
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    Now: $219.00
    Was: $329.00
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  • Out of stock
    Always Armed 16" .300 Blackout Upper Receiver with Stainless Steel Barrel, AXE Brake and 12" M-Lok Rail - Black Anodized
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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 16" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout Upper Receiver - Bazooka Green 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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    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BLACK ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BLACK
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $199.00
    Was: $299.00
    Always Armed 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 Chambered in .300 Blackout Pistol Length Gas System ...
    Now: $199.00
    Was: $299.00
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  • ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout Upper Receiver - Burnt Bronze Made in the USA Mil-Spec 7075 T6 16" 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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