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
10.5" 5.56mm with 9" M-Lok Pistol Kit OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - OD Green OD Green Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black Nitride...Sale: $439.00MSRP: $579.00 -
On Sale
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - OD Green
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - OD Green OD Green Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Carbine Length Gas System Grid Defense 14" M-Lok Free...Sale: $329.00MSRP: $429.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN 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 Zombie Green Cerakote FinishSale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN Made in the USA Zombie Green Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:8 Twist Barrel with...Sale: $219.00MSRP: $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 10.5" 5.56 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" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit - OD GREEN
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Magpul OD Green Cerakote Chambered in 9x19 Para 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $459.00MSRP: $729.00 -
Out of stockOn Sale
Ghost 18" .308 Winchester Billet Upper - Olive Drab Green
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - Olive Drab Green Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider...Sale: $409.00MSRP: $539.00 -
Out of stockOn Sale
Ghost 20" .308 Winchester Billet Rifle Kit - OD Green
Sale: $619.00MSRP: $749.00Ghost 20" .308 Winchester Billet Rifle Kit - OD Green Billet DPMS Pattern High Profile Upper 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK...Sale: $619.00MSRP: $749.00 -
On Sale
Ghost Firearms 7.5" 300 Blackout with 7" M-Lok Pistol Kit - OD Green
Sale: $379.00MSRP: $579.00Ghost Firearms 7.5".300 Pistol Kit - OD Green OD Green Cerakote Finished Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 7.5" 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $379.00MSRP: $579.00 -
Out of stockOn Sale
Grid Defense 16" .308 Winchester Billet Upper - OD Green
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - OD Green Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Mid-length gas system Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle Device 15"...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 18" 350 Legend Upper Receiver - OD Green
Sale: $349.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - OD Green Magpul OD Green Cerakote Finish Chambered in 350 Legend A2 Flash Hider 18" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid Defense...Sale: $349.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense GX2 7.5" 5.56 Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense GX2 7.5" 5.56 NATO Flash Can Upper Mil-Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO 9" Grid Defense GX2 Octagon M-Lok Rail Dimpled Flash Can Pistol Length Gas System Made in the...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" UPPER - .300 BLACKOUT UPPER RECEIVER WITH FLASH CAN - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" .22LR Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" .22LR Upper Receiver - OD Green Milspec 7075-T6 Upper Receiver 16" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 14" Grid Defense Octagon M-Lok Rail OD Green Cerakote Finish A2...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Ghost 16" .308 Winchester Billet Upper - Olive Drab Green
Sale: $399.00MSRP: $529.00Ghost 16" .308 Winchester Billet Upper - Olive Drab Green Billet DPMS Pattern High Profile Upper 16" 4150 Chrome Moly HBAR Contour Barrel Mid-Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK...Sale: $399.00MSRP: $529.00 -
On Sale
Ghost Firearms 10.5" 300 Blackout with M-Lok 9" Pistol Kit - OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5".300 Pistol Kit - OD Green Olive Drab Green 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 Steel...Sale: $439.00MSRP: $579.00 -
On Sale
Ghost Firearms 16" 7.62X39 WITH 14" M-LOK Rail Rifle Kit - OD GREEN
Sale: $519.00MSRP: $659.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Finished in Magpul OD Green Cerakote Chambered in 7.62x39 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail Carbine Length Gas System A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $519.00MSRP: $659.00 -
Out of stock
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver with Strike Industries American Flag Dust Cover - OD Green/FDE Combo
$381.95Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver Finished in Magpul Olive Drab Green Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas System Ghost...$381.95 -
On Sale
Grid Defense 16" 9mm Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Milspec 7075-T6 Upper Receiver 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 14" Grid Defense Octagon M-Lok Rail A2 Muzzle...Sale: $329.00MSRP: $399.00