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...
    Now: $219.00
    Was: $319.00
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    Was: $319.00
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  • ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE RIDGEWAY BLUE | 7.5" .300 BO BARREL
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    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $209.00
    Was: $309.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE 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...
    Now: $209.00
    Was: $309.00
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  • ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE
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    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE

    Now: $219.00
    Was: $319.00
    Always Armed 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...
    Now: $219.00
    Was: $319.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BAZOOKA GREEN

    Now: $209.00
    Was: $309.00
    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...
    Now: $209.00
    Was: $309.00
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    Was: $309.00
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  • Always Armed 7 inch free float M-LOK handguard and A2 flash hider Always Armed 7 inch free float M-LOK handguard and A2 flash hider
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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 – 7" M-LOK Handguard - Black Anodized (AA75BLK300) Product Description (HTML & Search-Optimized) Compact Power & Precision with the Always Armed 7.5"...
    Now: $189.00
    Was: $269.00
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  • Always Armed 7.5 inch 300 Blackout upper receiver in Magpul FDE Cerakote finish with 7 inch M-LOK handguard and 1:8 twist nitride barrel
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE

    Now: $209.00
    Was: $309.00
    Build an ultra-compact, high-performance AR pistol with the Always Armed 7.5" 300 Blackout Upper Receiver. Precision-engineered and 100% Made in the USA, this complete upper assembly delivers...
    Now: $209.00
    Was: $309.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED
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    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $209.00
    Was: $309.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Smith & Wesson Red 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...
    Now: $209.00
    Was: $309.00
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    Was: $309.00
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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...
    Now: $209.00
    Was: $309.00
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    Was: $309.00
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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...
    Now: $219.00
    Was: $269.00
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  • Close-up of the forged Mil-Spec 7075-T6 upper receiver showing dust cover, forward assist, and Magpul FDE Cerakote finish. Close-up of the 9.25" TR Series M-LOK free-float rail and .750 low profile gas block on the Always Armed FDE upper receiver.
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    ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE

    Now: $209.00
    Was: $299.00
    Complete your next build with the Always Armed TR Series 10.5" .300 Blackout Upper Receiver in FDE. Engineered for maximum reliability and tactical performance, this complete upper receiver features...
    Now: $209.00
    Was: $299.00
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  • Out of stock
    Always Armed 10.5 inch .300 Blackout BX Series complete upper receiver in hard coat black anodized finish
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    ALWAYS ARMED 10.5" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $279.00
    Upgrade your AR-15 pistol or SBR build with the high-performance
    Now: $189.00
    Was: $279.00
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    Now: $189.00
    Was: $279.00
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  • ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE
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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...
    Now: $219.00
    Was: $319.00
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    Now: $219.00
    Was: $319.00
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  • Out of stock
    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...
    $329.00
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    $329.00
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  • ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - 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...
    Now: $209.00
    Was: $299.00
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    Now: $209.00
    Was: $299.00
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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...
    Now: $219.00
    Was: $319.00
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    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...
    $299.00
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    $299.00
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    Out of stock
  • 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...
    $299.00
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    $299.00
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  • Out of stock
    Always Armed 10.5 inch 300 Blackout black upper receiver with FDE KeyMod handguard and A2 flash hider. 10 inch TR Series free-float KeyMod handguard in FDE Cerakote on an Always Armed 300 BLK upper.
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    ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL

    Now: $199.00
    Was: $299.00
    Optimize your AR-15 build for maximum versatility with the Always Armed 10.5" 300 Blackout Upper Receiver. Featuring a sharp two-tone c
    Now: $199.00
    Was: $299.00
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    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...
    $349.00
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    $349.00
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    Out of stock
  • Always Armed 16 inch .300 Blackout BX Series complete upper receiver in hard coat black anodized finish
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    ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK

    Now: $199.00
    Was: $299.00
    Upgrade your AR-15 build with the sleek, high-performance ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK. Made in the USA, this complete upper receiver features a durable hard-coat...
    Now: $199.00
    Was: $299.00
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    Now: $199.00
    Was: $299.00
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