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
Ghost Firearms 5.5" 9mm 1:10 HBAR Elite Barreled Upper - 7" M-LOK Rail - Flash Can - Tungsten Gray
Sale: $279.00MSRP: $329.00Ghost Firearms 5.5" Flash Can Upper with 7" Rail - Tungsten Gray Barrel - Length 5.5"/Black Nitride Finish Barrel Material 4150 Chrome Moly Steel 9mm Luger Gas System Type Blowback Flash Can Twist Rate1:10 7" M-LOK Free Float Rail...Sale: $279.00MSRP: $329.00 -
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 FLASH CAN UPPER RECEIVER WITH FDE FLASH CAN AND "WE THE PEOPLE" DUST COVER - OD GREEN
Sale: $209.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM FLASH CAN UPPER RECEIVER - OD GREEN Finished in OD Green Cerakote Milspec 7075-T6 Upper Receiver 5.5" 1:10 9mm Barrel - Black Nitride Chambered in 9mm Always Armed 7" M-Lok Rail Magpul Flat Dark Earth Flash Can Laser...Sale: $209.00MSRP: $319.00 -
On Sale
GRID DEFENSE 5.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $329.00MSRP: $399.00GRID DEFENSE 5.5" UPPER RECEIVER - 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA Dimpled Flash Can - 1/2x36 Thread Pattern 7" Grid Defense Octagon M-Lok Rail Chambered in 9x19 Para 5.5" 1:10 Twist...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 5.5" 9MM SS FLASH CAN OCTO SERIES UPPER RECEIVER - BURNT BRONZE
Sale: $199.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - BURNT BRONZE 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 Burnt Bronze...Sale: $199.00MSRP: $319.00 -
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 -
Ghost Suppressor Ready IHS 5.5" 9mm Upper Receiver
$229.00 - $249.00Ghost Suppressor Ready IHS 5.5" 9MM Upper Chambered in 9x19MM Para 5.5" 1:10 Twist 4150 Straight Profile Barrel Black Nitride 1/2x28 Thread Pattern Ghost Firearms 4.25" M-Lok Free Float Handguard IHS (Integral Hand Stop) Designed...$229.00 - $249.00 -
On Sale
ALWAYS ARMED 5.5" 9MM TR SERIES FLASH CAN UPPER RECEIVER - FDE
Sale: $219.00MSRP: $299.00ALWAYS ARMED 5.5" 9MM TR SERIES FLASH CAN UPPER RECEIVER - FDE Made in the USA Mil Spec AR15 Upper Receiver 1/2 x 36 thread pitch 5.5" 1:10 Twist 4150 Steel Barrel 7" TR Series Free Float M-LOK Rail Flash Can Muzzle Device Finished in Flat Dark...Sale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED OCTO SERIES 5.5" 9MM SS FLASH CAN UPPER RECEIVER - FDE
Sale: $199.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - FDE 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 Flat Dark Earth...Sale: $199.00MSRP: $319.00 -
On Sale
Ghost Firearms 5.5" 9mm 1:10 HBAR Elite Barreled Upper - 7" M-LOK Rail - Flash Can - Zombie Green
Sale: $249.00MSRP: $329.00Ghost Firearms 5.5" Flash Can Upper with 7" Rail - Zombie Green Barrel - Length 5.5"/Black Nitride Finish Barrel Material - 4150 Steel 9mm Luger Gas System Type Blowback 7" M-LOK Free Float Rail Flash Can Muzzle Device Twist...Sale: $249.00MSRP: $329.00 -
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 -
On Sale
ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - BURNT BRONZE
Sale: $424.00MSRP: $599.00ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - BURNT BRONZE Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para Flash Can Muzzle Device 7.25" Free Float...Sale: $424.00MSRP: $599.00 -
On Sale
ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - FDE
Sale: $424.00MSRP: $599.00ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - FDE Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para Flash Can Muzzle Device 7.25" Free Float M-LOK Hand...Sale: $424.00MSRP: $599.00 -
Grid Defense 5.5" 9mm FDE Upper Receiver with Burnt Bronze Flash Can
$409.00Grid Defense 5.5" 9mm FDE Upper Receiver with Burnt Bronze Flash Can Upper And Rail Finished in Magpul FDE Cerakote 5.5" 1:10 Twist 4150 Light HBAR Barrel - Black Nitride Made in the USA 7" Grid Defense Octagon M-Lok Rail Chambered in 9x19 Para Burnt...$409.00