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 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - FDE
Sale: $239.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Magpul FDE Cerakote FinishSale: $239.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Tungsten Gray Cerakote FinishSale: $219.00MSRP: $299.00 -
GHOST IHS 4.5" .22LR UPPER RECEIVER
$249.00 - $269.00GHOST IHS 4.5" .22LR UPPER RECEIVER Chambered in .22LR Hard Coat Black Anodized Finish Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel 1/2"-28 TPI Medium taper barrel profile 4.25" Ghost IHS (Integral Hand Stop) M-LOK Hand Rail Flash Can...$249.00 - $269.00 -
On Sale
Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Zombie Green
Sale: $414.00MSRP: $499.00Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Zombie Green Zombie Green Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 4.5" 1:10 Twist 4150 Chrome Moly Steel...Sale: $414.00MSRP: $499.00 -
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 -
Ghost Firearms IHS 4.5" 9mm Blast Can Upper
$249.00 - $269.00Ghost Firearms IHS 4.5" Blast Can Upper 9MM Chambered in 9x19MM Para Stubby Blast Can Muzzle Device 4.5" 1:10 Twist 4150 Light HBar Barrel Black Nitride 1/2x36 Thread Pattern Ghost Firearms 4.25" M-Lok Free Float Handguard IHS...$249.00 - $269.00 -
On Sale
Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - FDE
Sale: $414.00MSRP: $499.00Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - FDE Magpul Flat Dark Earth Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 4.5" 1:10 Twist 4150 Chrome Moly Steel Barrel...Sale: $414.00MSRP: $499.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - OD GREEN
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Magpul OD Green Cerakote FinishSale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - OD GREEN
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - OD GREEN Chambered in .22LR Finished in OD Green Cerakote Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel Salt bath nitride finished barrel 1/2"-28 TPI Medium taper barrel profile 4.25" TRX...Sale: $239.00MSRP: $359.00 -
On Sale
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BLUE TITANIUM
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BLUE TITANIUM Chambered in .22LR Finished in Blue Titanium Cerakote Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel Salt bath nitride finished barrel 1/2"-28 TPI Medium taper barrel profile 4...Sale: $239.00MSRP: $359.00 -
On Sale
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BURNT BRONZE
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BURNT BROZE Chambered in .22LR Finished in Burnt Bronze Cerakote Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel Salt bath nitride finished barrel 1/2"-28 TPI Medium taper barrel profile 4...Sale: $239.00MSRP: $359.00 -
Ghost IHS 4.5" .22LR Pistol Kit
$470.00 - $480.00Ghost IHS 4.5" .22LR Pistol Kit Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 4.5" 4150 Black Nitride Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered in .22 Long Rifle Straight Flute Flash Can...$470.00 - $480.00 -
Ghost IHS 4.5" 9mm Pistol Kit
$449.00 - $469.00Ghost IHS 4.5" Pistol Kit Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle Stubby Blast Can Muzzle Device 1/2x36 Thread Pattern 4.5" 1:10 Twist 4150 Chrome Moly Steel Barrel Black...$449.00 - $469.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - TITANIUM
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - TITANIUM Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Titanium Cerakote FinishSale: $219.00MSRP: $299.00 -
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 -
On Sale
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - FDE
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - FDE Chambered in .22LR Finished in FDE Cerakote Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel Salt bath nitride finished barrel 1/2"-28 TPI Medium taper barrel profile 4.25" TRX Series...Sale: $239.00MSRP: $359.00