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
Grid Defense 10.5" 5.56 Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Magpul Olive Drab Green Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED OCTO SERIES 10.5" 5.56 UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED OCTO SERIES 10.5" 5.56 UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:7 Twist Barrel with Black Nitride...Sale: $209.00MSRP: $299.00 -
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Tactical Grape
$399.00Grid Defense 10.5" 5.56 Flash Can Upper Receiver Finished in Purple Cerakote 5.56 Upper Receiver Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 4150 M4 Profile Barrel - Black Nitride Chambered in 5.56x45 NATO Carbine Length Gas System ...$399.00 -
ALWAYS ARMED Jester 10.5" 5.56 NATO UPPER RECEIVER - BLACK
$279.00ALWAYS ARMED JESTER 16" 5.56 NATO UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 5.56 Nato Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine...$279.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length Gas...Sale: $299.00MSRP: $379.00 -
On Sale
GRID DEFENSE 10.5" 9MM UPPER RECEIVER - FDE
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - FDE Finished in Flat Dark Earth Cerakote Mil Spec 7075-T6 Upper Receiver 10.5" 9MM Barrel Chrome Moly Vanadium 1:10 Twist Rate Straight Profile Barrel QPQ Corrosion Resistant Coating 9" Grid Defense...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK TR Series Rail 10.5" 1:8 Twist Barrel with...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 10.5" 7.62X39 UPPER RECEIVER - BAZOOKA GREEN
Sale: $209.00MSRP: $299.00Always Armed 10.5" 7.62X39 Upper Receiver - Bazooka Green Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7.62X39 Carbine Length Gas System .750...Sale: $209.00MSRP: $299.00 -
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
Grid Defense 10.5" 5.56 Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Burnt Bronze Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash Hider...Sale: $299.00MSRP: $379.00 -
ALWAYS ARMED 10.5" 5.56 NATO TR SERIES WITH TRINITY FORCE SIGHTS PISTOL KIT - BLACK ANODIZED
$489.00Always Armed 10.5" 5.56 NATO TRX Series with Trinity Force Sights Pistol Kit - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered...$489.00 -
On Sale
Ghost Firearms 10.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - OD Green
Sale: $449.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Magpul Olive Drab Green Cerakote Milspec 7075-T6 Upper Receiver 10.5" 1:8 4150 Light HBAR Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) .750 Low Profile Gas Block...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 10.5" 300 Blackout with M-Lok 9" Pistol Kit - Burnt Bronze
Sale: $379.00MSRP: $579.00GHOST FIREARMS 10.5" 300 BLACKOUT PISTOL KIT - BURNT BRONZE M-LOK 9" PISTOL KIT Burnt Bronze Cerakote Finish Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:8 Twist 4150 Chrome Moly...Sale: $379.00MSRP: $579.00 -
On Sale
Ghost Firearms 10.5" 5.56 Flash Can Upper Receiver Pistol Kit - Burnt Bronze
Sale: $449.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Burnt Bronze Cerakote Milspec 7075-T6 Upper Receiver 10.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System Ghost...Sale: $449.00MSRP: $599.00 -
On Sale
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" 5.56 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 4150 M4 Profile Barrel - Black Nitride Chambered in 5.56x45 NATO Carbine Length Gas System ...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Elite 10.5" 7.62X39 Upper Receiver - Burnt Bronze
Sale: $259.00MSRP: $329.00Ghost Elite 10.5" 7.62x39 Upper - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in 7.62x39 7075-T6 Milspec Upper Receiver 10.5" 1:10 Twist 4150 Steel Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash Hider Made...Sale: $259.00MSRP: $329.00 -
Ghost Elite 10.5" 5.56 Nato OD Green w/ Stainless Steel Upgrade & Nickel Boron BCG black charging handle
$449.00Ghost Firearms Elite 10.5" 5.56 Complete Upper - OD Green Made in the USA Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider Upgraded Stainless Steel 416R 10.5" 1:7 Twist M4 Barrel Carbine Length Gas System Ghost Firearms 9"...$449.00 -
On Sale
Ghost Firearms 10.5" 5.56 Flash Can Upper Receiver Pistol Kit - Blue Titanium
Sale: $399.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Blue Titanium Cerakote Milspec 7075-T6 Upper Receiver 10.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System...Sale: $399.00MSRP: $599.00 -
On Sale
Ghost Firearms Elite 10.5" 7.62X39 Upper Receiver - BLUE TITANIUM
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 10.5" 7.62x39 Upper - Blue titanium Blue Titanium Cerakote Finish Chambered in 7.62x39 7075-T6 Milspec Upper Receiver 10.5" 1:10 Twist 4150 Steel Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash...Sale: $259.00MSRP: $329.00 -
GRID DEFENSE 10.5" 5.56 STAINLESS STEEL FLASH CAN UPPER RECEIVER WITH RADIAN RAPTOR CHARGING HANDLE & NIB BOLT CARRIER GROUP
$599.00Grid Defense 10.5" 5.56 Stainless Steel Flash Can Upper Receiver With Radian Raptor Charging Handle & NIB Bolt Carrier Group Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4...$599.00