300 Blackout Build Kits
Build your own AR-15 with our complete 300 Blackout build kits, perfect for rifle and pistol configurations. Each kit includes high-quality components—uppers, lowers, and parts—designed for accuracy and reliability. Great for suppressed or subsonic setups, our 300BLK kits are easy to assemble and available in custom Cerakote finishes to match your style and shooting needs.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
ALWAYS ARMED OCTO SERIES 10.5" 300 BLACKOUT FLASH CAN UPPER RECEIVER - BLACK ANODIZED
Now: $189.00Was: $289.00ALWAYS 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: $189.00Was: $289.00 -
ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK
Now: $189.00Was: $289.00ALWAYS ARMED OCTO SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK Made in the USA Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:8 Twist Barrel with Black Nitride Finish A2...Now: $189.00Was: $289.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - TITANIUM
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Titanium Made in the USA Mil-Spec Lower Parts Kit Carbine Buffer Tube Assembly Rifle Butt Stock Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Now: $379.00Was: $529.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - BAZOOKA GREEN
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Bazooka Green Made in the USA Mil-Spec Lower Parts Kit Rifle Butt Stock Carbine Buffer Tube Assembly Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Now: $379.00Was: $529.00 -
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - SMITH & WESSON RED
Now: $359.00Was: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Smith & Wesson Red Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - TITANIUM
Now: $359.00Was: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Titanium Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - BURNT BRONZE
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Burnt Bronze Made in the USA Mil-Spec Lower Parts Kit Carbine Buffer Tube Assembly Rifle Butt Stock Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Now: $379.00Was: $529.00 -
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - TITANIUM
Now: $359.00Was: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Titanium Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - SMITH & WESSON RED
Now: $359.00Was: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Smith & Wesson Red Made in the USA Mil-Spec Lower Parts Kit 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: $359.00Was: $499.00 -
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - RIDGEWAY BLUE
Now: $359.00Was: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Ridgeway Blue Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - BAZOOKA GREEN
Now: $359.00Was: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Bazooka Green Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - SIG PINK
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Sig Pink Made in the USA Mil-Spec Lower Parts Kit Rifle Butt Stock Carbine Buffer Tube Assembly Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Now: $379.00Was: $529.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - RIDGEWAY BLUE
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Ridgeway Blue Made in the USA Mil-Spec Lower Parts Kit Rifle Butt Stock Carbine Buffer Tube Assembly Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Now: $379.00Was: $529.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - RIDGEWAY BLUE
Now: $359.00Was: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Ridgeway Blue Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - SMITH & WESSON RED
Now: $379.00Was: $529.00Always Armed 16" 300 Blackout Rifle Kit - Smith & Wesson Red Made in the USA Mil-Spec Lower Parts Kit Rifle Butt Stock Carbine Buffer Tube Assembly Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel...Now: $379.00Was: $529.00 -
ALWAYS ARMED JESTER 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK
Now: $189.00Was: $289.00ALWAYS ARMED JESTER 10.5" .300 BLACKOUT UPPER RECEIVER Chambered in .300 Blackout Mil-Spec 7075 T6 5.56 Nato Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Hard Coat Black Anodized...Now: $189.00Was: $289.00 -
ALWAYS ARMED 16" .300 BLACKOUT TR SERIES WITH TRINITY FORCE RIFLE KIT - BLACK
Now: $359.00Was: $489.00ALWAYS ARMED 16" .300 BLACKOUT TR SERIES RIFLE KIT - 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: $359.00Was: $489.00 -
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - SIG PINK
Now: $359.00Was: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Sig Pink Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - SIG PINK
Now: $359.00Was: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Sig Pink Made in the USA Mil-Spec Lower Parts Kit 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...Now: $359.00Was: $499.00 -
ALWAYS ARMED 10.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BURNT BRONZE
Now: $209.00Was: $299.00Always Armed 10.5" 300 Blackout TR Series 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...Now: $209.00Was: $299.00