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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Out of stockOn Sale
ALWAYS ARMED 16" .308 WIN UPPER RECEIVER WITH 15" M-LOK - FDE
Sale: $329.00MSRP: $459.00ALWAYS ARMED 16" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider 15" M-LOK Free Floating Rail Magpul FDE...Sale: $329.00MSRP: $459.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - SMITH & WESSON RED
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - SMITH & WESSON RED 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 5.56 NATO...Sale: $219.00MSRP: $319.00 -
Out of stockOn Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 15" KEYMOD HAND GUARD - BLACK
Sale: $209.00MSRP: $279.00Always Armed 16" 9MM Stainless Steel Upper Receiver With 15" Keymod Hand Guard Made in the USA Mil-Spec Upper Receiver with Dust Cover and Forward Assist 16" 416R Stainless Steel Barrel Chambered in 9x19 PARA 15" Free Floating Key Mod Hand Guard Black...Sale: $209.00MSRP: $279.00 -
On Sale
Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Titanium
Sale: $399.00MSRP: $499.00Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Titanium Titanium 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: $399.00MSRP: $499.00 -
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 -
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 -
Out of stock
ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER WITH SS AXE BRAKE- BLACK
$329.00ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER WITH SS AXE BRAKE- BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout Pistol...$329.00 -
On Sale
Ghost 16" .22LR Rifle Kit - FDE
Sale: $499.00MSRP: $619.00Ghost 16" .22LR Rifle Kit - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 4150 Black Nitride Barrel Lightweight Pencil Profile Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered in .22 Long Rifle...Sale: $499.00MSRP: $619.00 -
On 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 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $249.00MSRP: $309.00GHOST 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK Mil-Spec 7075 Forged Aluminum Upper Receiver 14" Ghost Firearms M-Lok Rail Black Anodized Finish 16" 1:7 Twist 416R Stainless Steel Barrel Stainless Steel A2 Birdcage Muzzle...Sale: $249.00MSRP: $309.00 -
On Sale
Ghost 18" .308 Winchester Billet Rifle Kit - Black
Sale: $589.00MSRP: $719.00Ghost 18" .308 Winchester Billet Rifle Kit - Black Billet DPMS Pattern High Profile Upper 18" 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 Free...Sale: $589.00MSRP: $719.00 -
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 -
Out of stockOn Sale
Ghost Firearms 16" 300 AAC Blackout with 14" M-LOK RAIL RIFLE KIT - TACTICAL GRAPE
Sale: $449.00MSRP: $599.00GHOST FIREARMS 16" 300 AAC BLACKOUT RIFLE KIT - Tactical Grape Finished in Purple Cerakote Chambered in 300 Blackout (7.62x35) 16" 1:8 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Pistol Length Gas...Sale: $449.00MSRP: $599.00 -
Out of stock
GHOST FIREARMS 16" 5.56 SS UPPER RECEIVER LIMITED EDITION WITH AMBI CHARGING HANDLE & AXE BRAKE - TITANIUM
$439.00GHOST FIREARMS 16" 5.56 SS UPPER RECEIVER LIMITED EDITION - TITANIUM Finished in Titanium Cerakote Milspec 7075-T6 Upper Receiver 16" 1:7 416R Stainless Steel Barrel Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System Ghost...$439.00 -
Out of stockOn 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 stockOn Sale
Ghost Firearms 16" 7.62X39 WITH 14" M-LOK Rail Rifle Kit - TUNGSTEN GRAY
Sale: $519.00MSRP: $659.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Finished in Tungsten Gray 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 TUNGSTEN GRAY UPPER RECEIVER WITH SMITH & WESSON RED FLASH CAN
$349.00GHOST FIREARMS 7.5" 5.56 FLASH CAN UPPER RECEIVER Proudly Made in the USA 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver - Tungsten Gray 7.5" 1:7 Twist 4150 Steel Barrel Pistol Length Gas System .750 Low Profile Gas Block Smith & Wesson Red...$349.00 -
On Sale
Ghost Vital 16" Upper 5.56 NATO With 11" Rail - Black
Sale: $239.00MSRP: $299.00Ghost Vital 16" 5.56 NATO With 11" Rail - Black Chambered in 5.56 NATO 16" 1:7 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper Receiver Mil-Spec...Sale: $239.00MSRP: $299.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Tactical Grape
Sale: $329.00MSRP: $399.00Grid Defense 16" Upper Receiver Purple Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper ReceiverSale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 18" 6mm ARC Upper Receiver - Black
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - Black Hard Coat Black Anodized Chambered in 6mm ARC 14" Free Float M-Lok Rail 18" 4150 Heavy Profile Barrel - Black Nitride 1:8 Twist Rate .750 Mid Length Gas System 5/8x24 Thread Pitch A2 Flash...Sale: $329.00MSRP: $419.00