300 Blackout Uppers
Our custom-built 300 Blackout uppers and accessories are designed to deliver superior performance and reliability. Our selection of 300 Blackout upper receivers and barrel assemblies are crafted from top-quality materials and built to the highest standards to ensure that you can build the ultimate firearm.
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Out of stock
16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard
$299.0016" .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 -
On Sale
GRID DEFENSE 16" .300 BLACKOUT UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Upper Receiver - Black Hard Coat Black Anodized Chambered in 300 Blackout (7.62x35) 14" M-Lok Rail 16" 1:8 4150 Light HBar Barrel - Black Nitride Pistol Length...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - OD Green OD Green Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
ALWAYS ARMED 6" .300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 6" 300 BLACKOUT UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 6" 1:7 Twist 4150 Barrel with Black Nitride...Sale: $189.00MSRP: $269.00 -
On Sale
Grid Defense Suppressor Ready 10.5" .300 Blackout Upper Receiver
Sale: $329.00MSRP: $399.00Grid Defense Suppressor Ready 10.5" .300 Blackout Upper Upper Specifications Mil-Spec Upper Receiver Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 9"...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Magpul OD Green Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Burnt Bronze Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black...Sale: $299.00MSRP: $379.00 -
On Sale
GRID DEFENSE 10.5" .300 BLACKOUT UPPER RECEIVER - BLACK
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 300 Blackout Upper Receiver Hard Coat Black Anodized Chambered in 300 Blackout (7.62x35) 7075-T6 Milspec Upper Receiver 10.5" 1:8 Twist 4150 Steel Light HBar Barrel - Black...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300...Sale: $299.00MSRP: $379.00 -
Out of stockOn Sale
ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL
Sale: $179.00MSRP: $299.00ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist Upper Finished in Hard Coat Black...Sale: $179.00MSRP: $299.00 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Magpul OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Magpul OD Green Magpul OD Green Cerakote Finish Chambered in .300 Blackout 14" M-Lok Quad Rail 16" 1:8 4150 Barrel - Black Nitride Pistol...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Elite 7.5" .300 Blackout Upper - FDE
Sale: $259.00MSRP: $329.00Ghost Elite 7.5" .300 Upper - FDE A2 Flash Hider Chambered in .300 Blackout 7.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free FSale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Magpul Flat Dark Earth Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense...Sale: $299.00MSRP: $379.00 -
Out of stockOn Sale
ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL
Sale: $229.00MSRP: $309.00ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 416R Stainless Steel...Sale: $229.00MSRP: $309.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $279.00ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 416R Stainless Steel...Sale: $179.00MSRP: $279.00