AR15 - 300 Blackout

AR15 - 300 Blackout

Upgrade your AR-15 with Always Armed .300 Blackout complete uppers and build kits. Designed for short-barrel performance and suppressed shooting, .300 Blackout (300 BLK) delivers .30-caliber power from compact platforms while using the same bolt, magazines, and lower as a standard 5.56 AR-15 — just swap the upper.

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  • Always Armed Jester 16 inch .300 Blackout complete rifle build kit in Burnt Bronze Cerakote finish
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    ALWAYS ARMED JESTER 16" .300 BLACKOUT RIFLE KIT - BURNT BRONZE

    Now: $379.00
    Was: $529.00
    Build a complete, high-performance rifle with the Always Armed Jester 16" .300 Blackout Rifle Kit in Burnt Bronze. Made in the USA, this all-in-one build kit includes everything needed to complete...
    Now: $379.00
    Was: $529.00
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    Now: $379.00
    Was: $529.00
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    Mil-Spec 7075-T6 titanium cerakote upper receiver showing dust cover and forward assist assembly Close-up of 7-inch Octo Series M-LOK handguard and Axe Brake muzzle device on Always Armed Titanium upper
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    ALWAYS ARMED OCTO SEREIS 7.5" 300 BLACKOUT UPPER RECEIVER WITH AXE BRAKE - TITANIUM

    $329.00
    The Always Armed Octo Series 7.5" .300 Blackout Complete Upper Receiver in Titanium Cerakote offers premium craftsmanship and hard-hitting performance in a compact footprint. Built from Mil-Spec...
    $329.00
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    $329.00
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    Always Armed OCTO Series 10.5 inch 300 Blackout Upper Receiver in Burnt Bronze Cerakote Close up of 9.25 inch OCTO M-LOK free float rail in Burnt Bronze Cerakote
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    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $309.00
    Always Armed OCTO Series 10.5" .300 Blackout Upper Receiver – Burnt Bronze Engineered for reliability, maneuverability, and premium aesthetic appeal, the Always Armed OCTO Series 10.5" .300 Blackout...
    Now: $209.00
    Was: $309.00
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    Now: $209.00
    Was: $309.00
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    Always Armed 7075-T6 300 Blackout upper receiver with forward assist and dust cover in FDE Always Armed OCTO Series 10.5 inch 300 Blackout Upper Receiver in Magpul FDE Cerakote
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    ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE

    Now: $209.00
    Was: $309.00
    Always Armed OCTO Series 10.5" .300 Blackout Upper Receiver – Flat Dark Earth (FDE) Engineered for reliability, maneuverability, and tactical style, the Always Armed OCTO Series 10.5" .300 Blackout...
    Now: $209.00
    Was: $309.00
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    Now: $209.00
    Was: $309.00
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  • Always Armed Octo Series 16 inch 300 Blackout complete rifle build kit in black Close-up of 15 inch Octo Series M-LOK handguard and 300 Blackout barrel finish
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT RIFLE KIT - BLACK

    Now: $379.00
    Was: $469.00
    Always Armed Octo Series 16" .300 Blackout Complete Rifle Build Kit – Black Build your custom .300 Blackout rifle from the ground up with the Always Armed Octo Series 16" .300 Blackout Rifle Kit...
    Now: $379.00
    Was: $469.00
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    Was: $469.00
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE showing the 15-inch M-LOK rail and A2 flash hider. Close-up view of the Tequila Sunrise Cerakote 7075-T6 upper receiver with installed dust cover and forward assist.
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE

    Now: $219.00
    Was: $319.00
    Elevate your rifle build with the ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TEQUILA SUNRISE. Precision-engineered in the USA, this complete upper receiver assembly is built around a...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY featuring a 15-inch M-LOK handguard and A2 flash hider. Close-up view of the Tungsten Gray Cerakote mil-spec 7075-T6 upper receiver with dust cover and forward assist installed.
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY

    Now: $219.00
    Was: $319.00
    Elevate your rifle setup with the ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - TUNGSTEN GRAY. Precision-crafted in the USA, this complete upper assemb
    Now: $219.00
    Was: $319.00
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  • Out of stock
    Close-up view of the Zombie Green Cerakote 7075-T6 upper receiver showing forward assist and dust cover assembly. ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN displaying the 15-inch M-LOK handguard and A2 flash hider.
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN

    Now: $219.00
    Was: $319.00
    Make a bold statement with the ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN. Precision-machined in the USA, this high-performance complete upper receiver assembly is built...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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  • Out of stock
    Always Armed Octo Series 16 inch 300 Blackout upper receiver with 15 inch M-LOK rail, 416R stainless steel barrel, and Ghost AXE brake in hardcoat black anodized finish ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL AND AXE BRAKE - BLACK
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    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL AND AXE BRAKE - BLACK

    $359.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL & AXE BRAKE
    $359.00
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    $359.00
    Subtotal:
    Out of stock
  • Out of stock
    Always Armed Octo Series 7.5 inch 300 Blackout upper receiver with 9.25 inch M-LOK handguard, 416R stainless steel barrel, and flash can muzzle device in hardcoat black anodized finish ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK

    $349.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH STAINLESS STEEL BARREL Build a high-performance AR-15 pistol or SBR with the Always Armed Octo Series 7.5" .300 Blackout...
    $349.00
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    $349.00
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  • Out of stock
    Always Armed TR Series 10.5" .300 Blackout Upper Receiver - Black Always Armed TR Series 10.5" .300 Blackout Upper Receiver - Black
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    Always Armed TR Series 10.5" .300 Blackout Upper Receiver - Black

    Now: $189.00
    Was: $289.00
    10.5" .300 Blackout Upper Receiver with 10" M-LOK Hand Guard  Made in the USA 10.5" 4150 Barrel Chambered in .300 Blackout 1:8 Twist 10" Free Floating Mlok Hand Guard Black Anodized Finish Pistol...
    Now: $189.00
    Was: $289.00
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    Now: $189.00
    Was: $289.00
    Subtotal:
    Out of stock
  • Out of stock
    Andro Corp 5 inch .300 Blackout Upper Receiver in Black — full side view 7075-T6 mil-spec receiver with forward assist and ejection port door on Andro Corp upper
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    Andro Corp 5" .300 Blackout Upper Receiver - Black

    $415.00
    Build the ultimate compact AR-15 setup with the Andro Corp 5" .300 Blackout Upper Receiver - Black. Purpose-built for maximum maneuverability and suppressed performance, this ultra-short upper...
    $415.00
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    $415.00
    Subtotal:
    Out of stock
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