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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Ghost 18" 5.56 NATO Rifle Length Rifle Kit
$429.00 - $449.00Ghost 18" 5.56 NATO Rifle Length Rifle Kit Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Rifle Length Gas System .750 Low...$429.00 - $449.00 -
On Sale
Grid Defense 18" 350 Legend Upper Receiver - Tungsten Gray
Sale: $339.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in 350 Legend A2 Flash Hider 18" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 18" M-Lok Free Float Hand Guard Grid...Sale: $339.00MSRP: $419.00 -
Grid Defense 18" 5.56 NATO Rifle Length Upper Receiver
$349.00Grid Defense 18" 5.56 NATO Rifle Length Upper Receiver Chambered in 5.56 NATO 14" Free Float M-Lok Rail 18" 1:7 Twist Government Profile 4150 Barrel - Black Nitride Rifle Length Gas System 1/2x28 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6...$349.00 -
On Sale
Grid Defense 7.5" 5.56 Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver Finished in Blue Titanium 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 GX2 7.5" 5.56 Flash Can Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense GX2 7.5" 5.56 NATO Flash Can Upper Mil-Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO 9" Grid Defense GX2 Octagon M-Lok Rail Dimpled Flash Can Pistol Length Gas System Made in the...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense GX2 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense GX2 7.5" 5.56 NATO Flash Can Upper Mil-Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO 9" Grid Defense GX2 Octagon M-Lok Rail Dimpled Flash Can Pistol Length Gas System Made in the...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Burnt Bronze Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Tungsten Gray Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout with 7" M-Lok Pistol Kit - FDE
Sale: $439.00MSRP: $579.00Ghost Firearms 7.5".300 Pistol Kit - Flat Dark Earth Finished in Flat Dark Earth Cerakote Chambered in .300 Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 5/8 by 24 7.5" 1:8 Twist 4150...Sale: $439.00MSRP: $579.00 -
On Sale
Ghost Firearms Elite 7.5" Stainless Steel Upper 9MM Magpul OD Green
Sale: $269.00MSRP: $359.00Ghost Firearms Elite 7.5" Upper 9MM - OD Green Chambered in 9x19MM Para A2 Flash Hider 1/2x36 Thread Pattern 7.5" 1:10 Twist 416R Stainless Steel Barrel Ghost Firearms 7" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper Receiver...Sale: $269.00MSRP: $359.00 -
Out of stock
Ghost Vital 7.5" 5.56 Pistol Build Kit With Nickel Boron Lower Parts kit
$499.00Ghost Firearms Vital 7.5" Upper Premium quality AR-15 pistol build kits, the Defense Grid 5.56 pistol kit, with complete lower parts and pistol buffer tube kit. Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider 10.5" 1:7...$499.00 -
Out of stockOn Sale
Grid Defense 18" .308 Winchester Billet Upper - FDE
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - FDE Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle Device 15"...Sale: $439.00MSRP: $579.00 -
On Sale
Grid Defense 18" 350 Legend Upper Receiver - Black
Sale: $349.00MSRP: $419.00Grid Defense 18" .350 Legend Upper Receiver - Black Hard Coat Black Anodized Chambered in .350 Legend 14" Free Float M-Lok Rail 18" 1:16 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6 Upper...Sale: $349.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense 7.5" 5.56 Upper Receiver - Pink Champagne
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver - Pink Champagne Finished in Pink Champagne Cerakote AR15 Skeletonized Upper 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...Sale: $299.00MSRP: $379.00 -
Out of stockOn Sale
Grid Defense 7.5" 5.56 Upper Receiver - Tequila Sunrise
Sale: $259.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver - Tequila Sunrise Mil-Spec Dust Cover and Forward Assist Finished in Tequila Sunrise Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 4150 M4 Barrel - Black Nitride 1:7 Twist Rate 1/2x28 TPI Thread Pitch 7"...Sale: $259.00MSRP: $379.00 -
On Sale
Grid Defense 7.5" 7.62x39 Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 7.62x39 Upper Receiver - FDE Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System A2 Flash Hider Chambered in 7.62x39 Finished In Flat Dark...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Blue Titanium Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - FDE
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - OD Green
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Magpul OD Green Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense 18" 6mm ARC Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote 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...Sale: $329.00MSRP: $419.00