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
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 -
Ghost IHS 4.5" 9mm Pistol Kit
$449.00 - $469.00Ghost IHS 4.5" Pistol Kit Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle Stubby Blast Can Muzzle Device 1/2x36 Thread Pattern 4.5" 1:10 Twist 4150 Chrome Moly Steel Barrel Black...$449.00 - $469.00 -
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 16" .308 Winchester Billet Upper - FDE
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - FDE Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Mid-length gas system Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle Device 15" M-LOK...Sale: $429.00MSRP: $569.00 -
Grid Defense 16" 5.56 NATO Lightweight Quad Rail Upper Receiver - FDE
$429.00Grid Defense 16" 5.56 NATO Lightweight Quad Rail Upper Receiver - FDE FDE Cerakote Finish Chambered in 5.56 NATO A2 Flash Hider 16" 1:7 Twist Pencil Profile Barrel Mid Length Gas System .625 Low Profile Gas Block Grid Defense 14" M-Lok Free Float Quad...$429.00 -
Out of stockOn Sale
Grid Defense 16" 5.56 Upper Receiver - Gold
Sale: $339.00MSRP: $409.00Grid Defense 16" 5.56 Upper Receiver - Gold Finished in FX Gold Cerakote 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: $339.00MSRP: $409.00 -
On Sale
Grid Defense 16" 9mm Stainless Steel Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - Blue Titanium 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 Finished in Blue Titanium Cerakote A2...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 9mm Stainless Steel Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - OD Green Milspec 7075-T6 Upper Receiver 16" 416R Stainless Steel Barrel 1/2x36 Thread Pattern 14" Grid Defense Octagon M-Lok Rail A2 Muzzle Device Finished in Olive Drab Green Cerakote Chambered in...Sale: $329.00MSRP: $399.00 -
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" 6.5 Creedmoor Billet Upper - FDE
Sale: $389.00MSRP: $579.00Grid Defense 18" 6.5 Creedmoor Billet Upper - FDE Upper Specifications Billet Upper Receiver Machined from 6061 Aluminum Fits DPMS Gen 1 Lower Receivers Made in the USA High Profile 15" Free Float M-LOK Handguard Finished in Magpul Flat Dark...Sale: $389.00MSRP: $579.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - OD Green
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - OD Green Magpul OD Green Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid...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 9" .22LR Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 9" .22LR Flash Can Upper Receiver - OD Green 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 Olive Drab Green Cerakote...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 9" .22LR Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR Upper Receiver - Blue Titanium Milspec 7075-T6 Upper Receiver 9" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 7" Grid Defense Octagon M-Lok Rail Finished in Blue Titanium...Sale: $299.00MSRP: $379.00 -
Out of stock
GRID DEFENSE GX2 10.5" 5.56 UPPER RECEIVER - BLACK
$379.00Grid Defense GX2 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 9" Grid Defense GX2...$379.00 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Stainless Steel 10.5" .300 Blackout Upper Receiver - FDE
$399.00Grid Defense 10.5" .300 Blackout Upper Receiver Finished in Magpul Flat Dark Earth Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length Gas System 9"...$399.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System...Sale: $329.00MSRP: $429.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - FDE
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System Grid...Sale: $329.00MSRP: $429.00