AR-15 | AR-10
Grid Defense is the first stop for your next AR15 build with our wide variety of barreled upper receivers to choose from. We offer a multitude of options from barrel length, color, handguard designs, and caliber. Whether you are a beginner or experienced gunsmith our uppers are designed to be easy to expand while staying cost friendly. Check out our Upper and Lower parts for everything else you need to complete your build.
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On Sale
ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - BLACK
Sale: $169.00MSRP: $299.00ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - BLACK Made in the USA Mil Spec AR15 Upper Receiver 1/2 x 36 thread pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel 7" Free Float M-LOK Rail Flash Can Muzzle Device Hard Coat Black...Sale: $169.00MSRP: $299.00 -
On Sale
GRID DEFENSE 5.5" 9MM FLASH CAN UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 5.5" 9mm Flash Can Upper Receiver Hard Coat Black Anodized Made in the USA Dimpled Flash Can 7" Grid Defense Octagon M-Lok Rail Chambered in 9x19 Para 5.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride Grid Defense 5.5" Upper ...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 5.5" 9MM STAINLESS STEEL TR SERIES UPPER RECEIVER WITH 4" RAIL - BLACK
Sale: $189.00MSRP: $269.00ALWAYS ARMED 5.5" 9MM SS TR SERIES UPPER RECEIVER WITH 4" RAIL - BLACK Made in the USA Mil Spec AR15 Upper Receiver 5.5" 1:10 Twist 416R Stainless Steel Barrel 4" Free Float M-LOK Rail Flash Can Muzzle Device Hard Coat Black Anodized...Sale: $189.00MSRP: $269.00 -
On Sale
ALWAYS ARMED 5.5" 9MM OCTO GEN 2 UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK
Sale: $219.00MSRP: $299.00ALWAYS ARMED 5.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 5.5" 1:10 Twist 416R Stainless Steel Barrel 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Hard Coat Black Anodized FinishSale: $219.00MSRP: $299.00 -
On Sale
Ghost Firearms 5.5" 9mm Stainless Steel Flash Can Upper Receiver - Black
Sale: $259.00MSRP: $349.00Ghost Firearms 5.5" 9mm Stainless Steel Flash Can Upper - Black Chambered in 9mm 5.5" 1:10 Twist 416R Stainless Steel Barrel Smooth Flash Can Muzzle Device Hard Coat Black Anodized Finish 7" Free Float M-LOK Hand Rail Made in The...Sale: $259.00MSRP: $349.00