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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Out of stockOn Sale
Grid Defense 16" 5.56 Upper Receiver With 12" Rail - Tequila Sunrise
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Upper Receiver With 12" Rail - Tequila Sunrise Tequila Sunrise Cerakote Finish Chambered in 5.56 1:7 Twist Rate 1/2x28 TPI Thread Pitch 12" Free Float M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 16" 8.6 Blackout Billet Upper - Black
Sale: $429.00MSRP: $569.00Grid Defense 16" 8.6 Blackout Billet Upper - Black Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Carbine length gas system Chambered in 8.6 Blackout 1:10 Twist Rate M18x1.5 TPI Thread Pitch .750 Gas Block A2 Flash Hider Muzzle...Sale: $429.00MSRP: $569.00 -
Out of stockOn Sale
Grid Defense 16" 8.6 Blackout Billet Upper - FDE
Sale: $429.00MSRP: $569.00Grid Defense 16" 8.6 Blackout Billet Upper - FDE Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Carbine length gas system Chambered in 8.6 Blackout 1:10 Twist Rate M18x1.5 TPI Thread Pitch .750 Gas Block A2 Flash Hider Muzzle...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 16" 9mm Stainless Steel Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - Tungsten Gray Milspec 7075-T6 Upper Receiver Finished in Tungsten Gray Cerakote 16" 416R Stainless Steel Barrel with 1:10 Twist Rate 1/2x36 Thread Pattern 14" Grid Defense Octagon M-Lok...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 18" .308 Winchester Billet Upper - Blue Titanium
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - Blue Titanium 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...Sale: $439.00MSRP: $579.00 -
On Sale
Grid Defense 18" 6.5 Creedmoor Billet Upper - Blue Titanium
Sale: $389.00MSRP: $579.00Grid Defense 18" 6.5 Creedmoor Billet Upper - Blue Titanium 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 Blue...Sale: $389.00MSRP: $579.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - Tungsten Gray
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 18" M-Lok Free Float Hand...Sale: $349.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense 7.5" 5.56 Upper Receiver - Periwinkle
Sale: $259.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver - Periwinkle Finished in Periwinkle 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...Sale: $259.00MSRP: $379.00 -
Out of stock
Grid Defense Limited Edition 16" 5.56 NATO Upper with Strike Industries Accessories - Periwinkle/Blue
$502.85Grid Defense 16" 5.56 Upper Receiver - Periwinkle Periwinkle 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 Receiver Strike Industries...$502.85 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - FDE Finished in Flat Dark Earth Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Pistol...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Stainless Steel 10.5" .300 Blackout Upper Receiver - Tactical Grape
$399.00Grid Defense 10.5" .300 Blackout Upper Receiver Finished in Purple Cerakote 10.5" Upper Receiver 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...$399.00 -
Out of stock
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Tactical Grape
$399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver Purple 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 Twist 416R Stainless...$399.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Black
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Black Finished in Hard Coat Black Anodize Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas...Sale: $329.00MSRP: $429.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Tactical Grape
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Tactical Grape Tactical Grape 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...Sale: $329.00MSRP: $429.00 -
On Sale
Ghost 18" 350 Legend Rifle Kit - FDE
Sale: $449.00MSRP: $519.00Ghost 18" 350 Legend Rifle Kit - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:16 Twist 4150 Barrel with Black Nitride Finish Chambered in 350 Legend Carbine Length Gas System .750 Low Profile Gas...Sale: $449.00MSRP: $519.00 -
Out of stockOn Sale
Grid Defense 16" 5.56 Upper Receiver With 12" Rail - Pink Champagne
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Upper Receiver With 12" Rail - Pink Champagne Pink Champagne Cerakote Finish Chambered in 5.56 1:7 Twist Rate 1/2x28 TPI Thread Pitch 12" Free Float M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2...Sale: $329.00MSRP: $399.00 -
Aero Precision 16" 5.56 NATO Upper Receiver - FDE
$534.99Aero Precision 16" 5.56 NATO Upper Receiver - FDE M4E1 Threaded Assembled Upper Receiver ATLAS S-ONE M-LOK Handguard of choice 16" 5.56 CMV Barrel Low Profile Gas Block and Mid-Length Gas Tube Product comes assembled This complete upper does not...$534.99 -
On Sale
Ghost 18" .308 Winchester Billet Rifle Kit - OD Green
Sale: $609.00MSRP: $739.00Ghost 18" .308 Winchester Billet Rifle Kit - OD Green Billet DPMS Pattern High Profile Upper 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK Free...Sale: $609.00MSRP: $739.00 -
Out of stockOn Sale
Ghost 9" .22LR Pistol Kit - Burnt Bronze
Sale: $480.00MSRP: $599.00Ghost 9" .22LR Pistol Kit - Burnt Bronze Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9" 4150 Black Nitride Barrel Lightweight Pencil Profile Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered in...Sale: $480.00MSRP: $599.00 -
On Sale
Andro Corp 5" .300 Blackout Upper Receiver - Black
Sale: $350.00MSRP: $415.00Andro Corp 5" .300 Blackout Upper Receiver - Black 4150 CMV Melonite 1:7 Twist M4 Feed Ramps Micro Length Gas System .750 Low Profile Gas Block QPQ Corrosion Resistant Finish A2 Flash Hider 5/8x24 Thread Pitch M-LOK Hand Guard 7075 T6...Sale: $350.00MSRP: $415.00