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 16" 7.62X39 UPPER RECEIVER - BLACK ANODIZED
Sale: $199.00MSRP: $299.00Always Armed 16" 7.62X39 Upper Receiver - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 4150 Barrel with Black Nitride Finish...Sale: $199.00MSRP: $299.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 5.56 NATO TR SERIES PISTOL KIT - BLACK ANODIZED
Sale: $339.00MSRP: $459.00Always Armed 7.5" 5.56 NATO TR Series Pistol Kit - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 4150 Barrel with Black Nitride...Sale: $339.00MSRP: $459.00 -
On Sale
ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO RIFLE KIT - BLACK
Sale: $349.00MSRP: $469.00ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO RIFLE KIT Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in...Sale: $349.00MSRP: $469.00 -
Out of stockOn Sale
Ghost 16" .308 Winchester Billet Upper - FDE
Sale: $399.00MSRP: $529.00Ghost Firearms 16" .308 Winchester Billet Upper - FDE Billet DPMS High Profile Pattern upper 16" 4150 chrome moly HBAR contour barrel, mid-length gas system Chambered in .308 Winchester with a 1:10...Sale: $399.00MSRP: $529.00 -
On Sale
Ghost 18" .308 Winchester Billet Upper - Black
Sale: $379.00MSRP: $519.00Ghost 18" .308 Winchester Billet Upper - Black Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10...Sale: $379.00MSRP: $519.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300...Sale: $299.00MSRP: $379.00 -
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...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol...Sale: $329.00MSRP: $399.00 -
On Sale
GRID DEFENSE 7.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Zombie Green Cerakote Finish Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride (1/2x36 Thread...Sale: $329.00MSRP: $399.00 -
On Sale
10.5" 5.56mm with 9" M-Lok Pistol Kit Blue Titanium
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - Blue Titanium Premium AR-15 pistol build kits, the M-Lok pistol kit with A2 flash can. Finished in blue titanium cerakote. Chambered in 5.56/.223 (5.56x45mm)...Sale: $439.00MSRP: $579.00 -
On Sale
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $469.00Always Armed 16" 300 Blackout Rifle Kit - Black Anodized Made in the USA Mil-Spec Lower Parts Kit Carbine Buffer Tube Assembly Rifle Butt Stock Mil-Spec 7075 T6 Upper Receiver with Dust Cover and...Sale: $349.00MSRP: $469.00 -
Out of stockOn Sale
ALWAYS ARMED 20" .308 WIN UPPER RECEIVER WITH 15" M-LOK - BLACK ANODIZED
Sale: $329.00MSRP: $459.00ALWAYS ARMED 20" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread...Sale: $329.00MSRP: $459.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit - FDE
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Magpul Flat Dark Earth Cerakote Chambered in 9x19 Para 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 1/2x36 Thread Pattern 14" Ghost Firearms Free...Sale: $459.00MSRP: $729.00 -
On Sale
Ghost Firearms Elite 16" Upper 7.62X39 - OD GREEN
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" Upper - OD GREEN Magpul OD Green Cerakote Finished Chambered in 7.62x39 A2 Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas...Sale: $269.00MSRP: $349.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER WITH 15" TR RAIL TRINITY FORCE SIGHTS RIFLE KIT - FDE
Sale: $389.00MSRP: $519.98Always Armed 16" 5.56 NATO Upper With 15" TR Rail Trinity Force Sights Rifle Kit - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Barrel...Sale: $389.00MSRP: $519.98 -
Out of stockOn Sale
ALWAYS ARMED 7.5" STAINLESS STEEL 9MM COMPLETE UPPER RECEIVER WITH BCG/CH - BLACK
Sale: $289.00MSRP: $457.00ALWAYS ARMED 7.5" STAINLESS STEEL 9MM UPPER RECEIVER WITH BCG/CH - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver 7" MLOK Hand Guard 7.5" 1:10 Twist 416R Stainless Steel...Sale: $289.00MSRP: $457.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit - Blue Titanium
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Blue Titanium Cerakote Chambered in 9x19 Para 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 1/2x36 Thread Pattern 14" Ghost Firearms Free Float...Sale: $459.00MSRP: $729.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - Blue Titanium
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Blue Titanium Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:8 4150 Light HBar Barrel - Black Nitride Chambered in .300...Sale: $449.00MSRP: $599.00 -
On Sale
GHOST FIREARMS 7.5" 5.56mm with 7" M-Lok Pistol Kit - FDE
Sale: $439.00MSRP: $579.00GHOST FIREARMS 7.5" 5.56 NATO PISTOL KIT - FDE Finished in Flat Dark Earth Cerakote Chambered in .223/5.56 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash HidSale: $439.00MSRP: $579.00