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.

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Always Armed 10.5" 300 Blackout Upper Receiver - Black Milspec AR-15 10.5" Always Armed Upper with 1:8 Twist
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED

    Now: $189.00
    Was: $249.00
    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 System ...
    Now: $189.00
    Was: $249.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $189.00
    Was: $249.00
    Subtotal:
    Choose Options
  • Always Armed 16" 1:8 Twist 300 Blackout Upper Receiver - Black AR15 Always Armed Upper with 1:8 Twist Barrel
    Choose Options
    Quick view

    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $199.00
    Was: $269.00
    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 .750...
    Now: $199.00
    Was: $269.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $199.00
    Was: $269.00
    Subtotal:
    Choose Options
  • AR-15 Always Armed 16" 300 Blackout Upper Receiver - Magpul FDE 16" .300 Blackout Rifle Upper Receiver - Flat Dark Earth Cerakote
    Choose Options
    Quick view

    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 in .300 Blackout Pistol Length Gas System ...
    Now: $219.00
    Was: $319.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
    Choose Options
  • Always Armed Magpul Flat Dark Earth 10.5" 300 Blackout Upper Receiver 10.5" Pistol Upper Receiver Chambered in .300 AAC - FDE Cerakote Finish
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Magpul FDE 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 10.5" 300 Blackout 1:8 Twist Upper Receiver 10.5" Pistol .300 Upper Receiver with 10" Rail - Burnt Bronze Cerakote
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Burnt Bronze 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 7.5" 300 Blackout Upper Receiver - Black Anodized AR-15 Always Armed 7.5" Upper with 1:8 Twist 4150 Steel Barrel
    Choose Options
    Quick view

    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - BLACK

    Now: $189.00
    Was: $249.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Black 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: $249.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $189.00
    Was: $249.00
    Subtotal:
    Choose Options
  • Always Armed 7.5" 300 Blackout AR15 Upper Receiver - Magpul FDE Milspec Pistol Upper Receiver Chambered in .300 Blackout - Flat Dark Earth
    Choose Options
    Quick view

    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Magpul FDE 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 10.5" 300 Blackout Upper Receiver - Black Milspec AR-15 10.5" Always Armed Upper with 1:8 Twist
    Quick view

    ALWAYS ARMED OCTO SERIES 10.5" 300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK ANODIZED

    Now: $219.00
    Was: $279.00
    ALWAYS ARMED OCTO SERIES 10.5" 300 BLACKOUT FLASH CAN 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...
    Now: $219.00
    Was: $279.00
    Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $279.00
    Subtotal:
  • Always Armed AR15 16" 300 Blackout Upper Receiver with 15" Rail 16" .300 Blackout Rifle Upper Receiver - Burnt Bronze Cerakote
    Choose Options
    Quick view

    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 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
    Choose Options
  • Burnt Bronze Always Armed 7.5" 300 Blackout 1:8 Twist Upper Receiver 7.5" Pistol Upper Receiver Chambered in 762x35 - Burnt Bronze Cerakote
    Choose Options
    Quick view

    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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 10.5" 300 Blackout Upper Receiver with M-Lok Hand Guard Mil-Spec 10.5" .300 Blackout Pistol Upper Receiver - Titanium Cerakote Finish
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - TITANIUM

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Titanium 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 System ...
    Now: $209.00
    Was: $299.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 16" 300 Blackout Upper Receiver with MLOK Rail Titanium Cerakoted 16" .300 Blackout Rifle Upper - Always Armed
    Choose Options
    Quick view

    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - TITANIUM

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout Upper Receiver - Titanium 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
    Choose Options
  • Always Armed 7.5" 300 Blackout Upper Receiver with 7" MLOK Hand Guard 7.5" 1:8 Twist 300 Blackout Upper - Smith & Wesson Red Cerakote
    Choose Options
    Quick view

    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $209.00
    Was: $299.00
    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 Finish Chambered in .300 Blackout Pistol Length...
    Now: $209.00
    Was: $299.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed Mil-Spec 7.5" 300 Blackout Upper Receiver with MLOK Hand Guard AR15 Pistol Upper Receiver Chambered in .300 Blackout - Titanium Cerakote Finish
    Choose Options
    Quick view

    ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - TITANIUM

    Now: $209.00
    Was: $299.00
    Always Armed 7.5" 300 Blackout Upper Receiver - Titanium 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • ALWAYS ARMED 16" UPPER RECEIVER COMBO DEAL .300 BLACKOUT RIFLE UPPER RECEIVER - M4
    Choose Options
    Quick view

    ALWAYS ARMED 16" UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT

    Now: $399.00
    Was: $538.00
    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 .750...
    Now: $399.00
    Was: $538.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $399.00
    Was: $538.00
    Subtotal:
    Choose Options
  • Always Armed 10.5" .300 Blackout Upper Receiver with 10" Rail AR-15 10.5" 300 Blackout Pistol Upper Receiver - Smith & Wesson Red
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Smith & Wesson Red 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: $209.00
    Was: $299.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • Always Armed 10.5" 300 Blackout Upper Receiver with Free Float Hand Guard Mil-Spec 10.5" Upper Receiver Chambered in .300 Blackout - Ridgeway Blue Cerakote
    Choose Options
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE

    Now: $209.00
    Was: $299.00
    Always Armed 10.5" 300 Blackout Upper Receiver - Ridgeway Blue 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
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $209.00
    Was: $299.00
    Subtotal:
    Choose Options
  • ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - STAINLESS STEEL
    Quick view

    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLEMISHED

    $279.00
    ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLEMISHED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist  10.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout Pistol...
    $279.00
    Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    $279.00
    Subtotal:
  • Always Armed 16" 300 Blackout Upper Receiver with 15" Free Float Rail 16" .300 Blackout Rifle Upper Receiver - Bazooka Green Cerakote
    Choose Options
    Quick view

    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...
    Now: $219.00
    Was: $319.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
    Choose Options
  • AR 15 | Always Armed 16" 300 Blackout Upper Receiver with 15" M-Lok Rail Mil-Spec 16" .300 AAC Rifle Upper Receiver - Smith & Wesson Red | Pistol Length Gas System
    Choose Options
    Quick view

    ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED

    Now: $219.00
    Was: $319.00
    Always Armed 16" 300 Blackout 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 Blackout Pistol Length...
    Now: $219.00
    Was: $319.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $319.00
    Subtotal:
    Choose Options
  • Total: items /

Adding your products to cart

View Cart Continue Shopping