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 Stainless Steel 10.5" 5.56 Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 556 Upper Receiver Burnt Bronze Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 10.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Carbine Length Gas System Grid Defense 9" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
On Sale
US MILITARY 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 12" JESTER RAIL - BLACK
Sale: $229.00MSRP: $299.00VETERAN'S DAY 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 12" MLOK RAIL - BLACK Hard Coat Black Anodized Finish Mil-Spec AR15 Upper Receiver Mil-Spec Forward Assist Laser Engraved Dust Cover 12" Jester Free Float M-LOK Rail 10.5" 1:7...Sale: $229.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - MAGPUL FDE
Sale: $359.00MSRP: $499.00Always Armed 10.5" 300 Blackout Pistol Kit - Magpul FDE Made in the USA Mil-Spec Lower Parts Kit Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 300 Blackout...Sale: $359.00MSRP: $499.00 -
On Sale
Ghost Firearms 5.5" 9mm Stainless Steel Flash Can Upper Receiver - Black
Sale: $259.00MSRP: $349.00Ghost Firearms 5.5" 9mm Stainless Steel Flash Can Upper - Black Chambered in 9mm 5.5" 1:10 Twist 416R Stainless Steel Barrel Smooth Flash Can Muzzle Device Hard Coat Black Anodized Finish 7" Free Float M-LOK Hand Rail Made in The...Sale: $259.00MSRP: $349.00 -
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 -
Out of stockOn Sale
Grid Defense 10.5" 5.56 Upper Receiver - Tequila Sunrise
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Tequila Sunrise 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 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - FDE
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56 NATO Grid Defense Mil Spec 7075 T6 Upper Receiver Grid Defense 9" M-Lok Free Float Hand Guard Carbine Length Gas System 10.5" 1:7...Sale: $299.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 KEYMOD UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED 10.5" 5.56 KEYMOD UPPER RECEIVER - FDE Made in the USA Finished in Flat Dark Earth Cerakote Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO BX SERIES PISTOL KIT - BLACK ANODIZED
Sale: $349.00MSRP: $479.00ALWAYS ARMED 10.5" 5.56 NATO BX SERIES PISTOL KIT 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 in 5.56 NATO Carbine Length Gas System .750 Low...Sale: $349.00MSRP: $479.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO PISTOL KIT - MAGPUL FDE
Sale: $359.00MSRP: $499.00Always Armed 10.5" 5.56 NATO Pistol Kit - Magpul FDE 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 in 5.56 NATO Carbine Length Gas System .750 Low...Sale: $359.00MSRP: $499.00 -
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 Elite 10.5" Upper 5.56 Nato With Engraved Dust Cover/Flash Can - Tungsten Gray
Sale: $299.00MSRP: $389.00Ghost Elite 10.5" Upper 5.56 Nato With Engraved Dust Cover/Flash Can - Tungsten Gray Chambered in 5.56x45 NATO (5.56/.223) Smooth Flash Hider 10.5" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost...Sale: $299.00MSRP: $389.00 -
On Sale
GHOST FIREARMS 10.5" 5.56 BURNT BRONZE UPPER RECEIVER WITH 9" FDE M-LOK RAIL
Sale: $269.00MSRP: $329.00GHOST FIREARMS 10.5" 5.56 NATO UPPER RECEIVER Chambered in 5.56 NATO 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver - Burnt Bronze A2 Birdcage Flash Hider 10.5" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System Ghost Firearms FDE 9"...Sale: $269.00MSRP: $329.00 -
On Sale
Ghost Firearms Vital 10.5" 7.62x39 Pistol Kit
Sale: $479.00MSRP: $539.00Ghost Firearms Vital 10.5" Upper Premium AR-15 complete pistol kit Chambered in 7.62X39 A2 Birdcage Flash Hider 10.5" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost Firearms 9" M-Lok Free...Sale: $479.00MSRP: $539.00 -
Ghost Vital 10.5" Upper 5.56 Nato With Stainless Steel Barrel with BCG & Charging Handle
$399.00GHOST FIREARMS VITAL 10.5" 5.56 UPPER RECEIVER - BLACK Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider (Black) 10.5" 1:7 Twist 416R M4 Stainless Steel Barrel Carbine Length Gas System Ghost Firearms 9"...$399.00 -
Grid Defense 10.5" 5.56 Upper Receiver with Stainless Steel Barrel - Tactical Grape
$409.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Purple Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4 Barrel 9" MLOK Hand Guard .750 Low Profile Gas Block Carbine Length Gas System A2 Flash...$409.00 -
On Sale
GRID DEFENSE 10.5" 9MM UPPER RECEIVER - BURNT BRONZE
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - Burnt Bronze Finished in Burnt Bronze 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 10.5" 7.62X39 UPPER RECEIVER - TITANIUM
Sale: $209.00MSRP: $299.00Always Armed 10.5" 7.62X39 Upper Receiver - Titanium 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 Low...Sale: $209.00MSRP: $299.00 -
On Sale
GHOST ELITE 10.5" UPPER .300 BLACKOUT WITH AXE BRAKE - ZOMBIE GREEN
Sale: $329.00MSRP: $378.99GHOST ELITE 10.5" UPPER .300 BLACKOUT WITH AXE BRAKE - ZOMBIE GREEN Zombie Green Cerakote Finished Chambered in .300 Blackout Ghost Firearms AXE Brake 10.5" 1:8 Twist 4150 Black Nitride Barrel Pistol Length Gas System Ghost Firearms 9"...Sale: $329.00MSRP: $378.99 -
On Sale
Ghost Firearms Elite 10.5" 7.62X39 Upper Receiver - FDE
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 10.5" Upper - FDE Flat Dark Earth Cerakote Finished Chambered in 7.62x39 A2 Flash Hider 10.5" 1:10 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 9"...Sale: $259.00MSRP: $329.00