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 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 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
  • 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
  • Always Armed 5" .300 Blackout Octo IHS Upper Receiver Always Armed 5" .300 Blackout Octo IHS Upper Receiver
    Choose Options
    Quick view

    Always Armed 5" .300 Blackout Octo IHS Upper Receiver

    Now: $219.00
    Was: $299.00
    Always Armed 5" .300 Octo IHS Upper Receiver Chambered in .300 Blackout 4150 salt bath nitride barrel 5/8x24 TPI thread pitch 1:5 twist rate Micro length gas system Mil-Spec upper receiver Upper machined from 7075 forged aluminum A2 flash hider...
    Now: $219.00
    Was: $299.00
    Choose Options Quick view
    Qty in Cart: 0
    Quantity:
    Price:
    Now: $219.00
    Was: $299.00
    Subtotal:
    Choose Options
  • AR15 Upper Receiver | .300 Blackout Finished in Smith & Wesson Red Cerakote
    Choose Options
    Quick view

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

    Now: $219.00
    Was: $319.00
    ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED Made in the USA Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:8 Twist Barrel with Black Nitride...
    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 OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED SMITH & WESSON RED CERAKOTE | 7.5" .300 BO BARREL
    Choose Options
    Quick view

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

    Now: $209.00
    Was: $299.00
    ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED 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 Twist Barrel with Black Nitride Finish A2...
    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
  • Total: items /

Adding your products to cart

View Cart Continue Shopping