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 9" .22LR Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 9" .22LR Flash Can Upper Receiver - FDE Milspec 7075-T6 Upper Receiver 9" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 9" Grid Defense Octagon M-Lok Rail Flat Dark Earth Cerakote Fluted...Sale: $329.00MSRP: $399.00 -
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
Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in .223 Wylde 16" 416R Stainless Steel Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Carbine Length Gas...Sale: $329.00MSRP: $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 -
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
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Burnt Bronze Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 7.5" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System Grid...Sale: $299.00MSRP: $399.00 -
On Sale
Ghost 16" .308 Winchester Billet Rifle Kit - Burnt Bronze
Sale: $599.00MSRP: $729.00Ghost 16" .308 Winchester Billet Rifle Kit - Burnt Bronze 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...Sale: $599.00MSRP: $729.00 -
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 7.5" 300 Blackout with 7" M-Lok Pistol Kit Burnt Bronze
Sale: $439.00MSRP: $579.00GHOST FIREARMS 7.5" 300 Blackout Upper M-Lok Pistol Kit- BURNT BRONZE 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: $439.00MSRP: $579.00 -
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 -
Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - FDE
$414.00Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - Flat Dark Earth Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas...$414.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - FDE
Sale: $239.00MSRP: $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 Magpul FDE Cerakote FinishSale: $239.00MSRP: $299.00 -
Out of stock
Always Armed 7.5" Stainless Steel 9mm Upper Receiver - FDE
$349.00ALWAYS ARMED 7.5" STAINLESS STEEL 9MM UPPER RECEIVER - MAGPUL FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:10 Twist 416R Stainless Steel Barrel 1/2x36 Thread Pattern Chambered in 9X19...$349.00 -
On Sale
Ghost 16" .22LR Rifle Kit - Burnt Bronze
Sale: $499.00MSRP: $619.00Ghost 16" .22LR Rifle Kit - Burnt Bronze 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...Sale: $499.00MSRP: $619.00 -
On Sale
GHOST FIREARMS 16" 5.56 NATO UPPER RECEIVER WITH 11" RAIL - FDE
Sale: $259.00MSRP: $339.00GHOST FIREARMS 16" 5.56 NATO UPPER RECEIVER WITH 11" RAIL - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Steel Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length Gas...Sale: $259.00MSRP: $339.00 -
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 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in .300 Blackout 14" M-Lok Quad Rail 16" 1:8 4150 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" 9mm Stainless Steel Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - FDE Finished in Flat Dark Earth Cerakote Milspec 7075-T6 Upper Receiver 16" 416R Stainless Steel Barrel with 1:10 Twist Rate 1/2x36 Thread Pattern 14" Grid Defense Octagon M-Lok Rail A2 Muzzle Device...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 20" .308 Winchester Billet Upper - FDE
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - FDE DPMS Pattern upper 20" 4150 Chrome Moly Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern Axe Brake Muzzle Device 15" M-LOK Free Floating Rail Finished in Flat Dark...Sale: $449.00MSRP: $589.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - FDE
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch Grid Defense 14" M-Lok Free Float...Sale: $349.00MSRP: $419.00