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 4.5" 9MM TR SERIES UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $269.00ALWAYS ARMED 4.5" 9MM TR SERIES UPPER RECEIVER - BLACK Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4" TR Series Free Float M-LOK Handguard A2 Muzzle Device Hard Coat Black Anodized FinishSale: $179.00MSRP: $269.00 -
On Sale
Ghost Firearms Elite 16" Upper 7.62X39 - BLACK ANODIZED
Sale: $249.00MSRP: $319.00GHOST FIREARMS ELITE 16" UPPER RECEIVER | BLACK ANODIZED 7.62X39 UPPER Chambered in 7.62x39 A2 Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost Firearms 14" M-Lok Free Float...Sale: $249.00MSRP: $319.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 AR-15 Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Burnt Bronze Complete Upper 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...Sale: $329.00MSRP: $399.00 -
On Sale
GRID DEFENSE 5.5" 9MM FLASH CAN UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 5.5" 9mm Flash Can Upper Receiver Hard Coat Black Anodized Made in the USA Dimpled Flash Can 7" Grid Defense Octagon M-Lok Rail Chambered in 9x19 Para 5.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride Grid Defense 5.5" Upper ...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
ALWAYS ARMED 18" .308 WIN UPPER RECEIVER WITH 15" M-LOK - BLACK ANODIZED
Sale: $319.00MSRP: $449.00ALWAYS ARMED 18" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 18" 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...Sale: $319.00MSRP: $449.00 -
On Sale
Ghost IHS 5" Upper .300 Blackout
$219.00 - $239.00Ghost IHS 5" .300 Blackout Upper Receiver Hard Coat Black Anodized Finish Chambered in .300 Blackout A2 Flash Hider 5" 1:5 Twist 4150 Chrome Moly Vanadium Barrel 5/8x24 Thread Pitch Micro Length Gas System Ghost 4.25" Integral...$219.00 - $239.00 -
On Sale
Ghost Firearms Elite 7.5" Upper 9MM - Tactical Grape
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5" Upper 9MM - Tactical Grape Tactical Grape Cerakote Finished Chambered in 9x19MM Para A2 Flash Hider 1/2x36 Thread Pattern 7.5" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 7" M-Lok Free...Sale: $259.00MSRP: $329.00 -
On Sale
GRID DEFENSE 10.5" 5.56 UPPER RECEIVER - BLACK
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Hard Coat Black Anodized 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 Made in the...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...Sale: $199.00MSRP: $299.00 -
On Sale
GRID DEFENSE 16" .300 BLACKOUT UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Upper Receiver - Black Hard Coat Black Anodized Chambered in 300 Blackout (7.62x35) 14" M-Lok Rail 16" 1:8 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Upper Receiver - Blue Titanium Blue Titanium 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
ALWAYS ARMED 16" 5.56 NATO RIFLE KIT WITH BI-POD AND SIGHTS - BLACK ANODIZED
Sale: $349.00MSRP: $598.49ALWAYS ARMED 16" 5.56 NATO RIFLE KIT WITH BI-POD AND SIGHTS - BLACK ANODIZED 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...Sale: $349.00MSRP: $598.49 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - OD Green OD Green Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System Grid Defense 14" M-Lok Free Float Hand...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $249.00MSRP: $299.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56 NATO Carbine Length Gas System ...Sale: $249.00MSRP: $299.00 -
On Sale
Ghost Firearms 16" 300 AAC Blackout with 14" M-Lok Rifle Kit - Blue Titanium
Sale: $449.00MSRP: $599.00Ghost Firearms 16" .300 AAC Rifle Kit - Blue Titanium Blue Titanium Cerakote Finish Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 16" 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $449.00MSRP: $599.00 -
On Sale
Grid Defense 7.5" 5.56 Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver Finished in Magpul Flat Dark Earth Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System A2 Flash Hider Chambered in...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" 7.62x39 Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 7.62x39 Upper Receiver - OD Finished in Magpul Olive Drab Green Chambered in 7.62x39 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride A2 Muzzle Device 14" Free Floating M-Lok Rail Milspec 7075-T6 Upper Receiver Carbine Gas...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 7.5" 5.56 NATO Flash Can Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote 5.56 Flash Can Upper Made in the USA 1:7 Twist 7.5" 4150 M4 Barrel - Black Nitride 9" Octagon M-Lok Hand Guard Dimpled Flash Can 7075-T6 Mil...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED
Sale: $219.00MSRP: $319.00Always Armed 16" 300 Blackout Upper Receiver - Smith & Wesson Red Made in the USA Mil-Spec 7075 T6 Blackout Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300...Sale: $219.00MSRP: $319.00 -
On Sale
Ghost Firearms 7.5" 9mm with 7" M-Lok Pistol Kit - Blue Titanium
Sale: $449.00MSRP: $699.00Ghost Firearms 7.5" Pistol Kit - Blue Titanium Blue Titanium Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 1/2x36 Thread Pattern 7.5" 1:10 Twist 4150 Chrome...Sale: $449.00MSRP: $699.00