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 stock
GRID DEFENSE 10.5" 5.56 UPPER RECEIVER W/ BCG, CHARGING HANDLE, MBUS & AXE BRAKE
$559.00GRID DEFENSE 10.5" 5.56 STAINLESS STEEL COMPLETE UPPER RECEIVER W/ MBUS & AXE BRAKE Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4 Profile Barrel Chambered in 5.56x45...$559.00 -
On Sale
GRID DEFENSE 10.5" 9MM UPPER RECEIVER - BLUE TITANIUM
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - Blue Titanium Finished in Blue Titanium 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...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Black Black Anodized Finish Chambered in .300 Blackout A2 Flash Hider 16" 1:8 Twist 4150 Barrel - Black Nitride Pistol Length Gas System Grid Defense 14" M-Lok Free Float Quad Rail Grid Defense...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 16" .308 Winchester Billet Upper - Black
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - Black 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"...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 16" 9mm Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Milspec 7075-T6 Upper Receiver 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 14" Grid Defense Octagon M-Lok Rail A2 Muzzle Device...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 18" .308 Winchester Billet Upper - OD Green
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - OD Green 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...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 -
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 -
Out of stockOn Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Pink Champagne
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver - Pink Champagne Finished in Pink Champagne Cerakote AR15 Skeletonized Upper Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 M4 Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 7.5" 7.62x39 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 7.62x39 Upper Receiver - Tungsten Gray Chambered in 7.62x39 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...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 9" .22LR Flash Can Upper Receiver - Black
Sale: $299.00MSRP: $399.00Grid Defense 9" .22LR Flash Can Upper Receiver - Black 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 Hard Coat Black...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense 9" .22LR Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR 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 7" Grid Defense Octagon M-Lok Rail Finished in Flat Dark Earth...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 10.5" .223 Wylde Upper Receiver - Black
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Black Hard Coat Black Anodized Finish Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Pistol Length...Sale: $299.00MSRP: $379.00 -
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 -
Grid Defense Suppressor Ready 10.5" 5.56 NATO Upper Receiver
$319.00Grid Defense Suppressor Ready 10.5" 5.56 NATO Upper Upper Specifications Mil-Spec Upper Receiver Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 9" Free Float Grid Defense Handguard Available in...$319.00 -
Out of stock
ALWAYS ARMED 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER - MAGPUL FDE/OD GREEN LIMITED EDITION
$358.00Always Armed 10.5" 5.56 NATO Flash Can Upper Receiver - LIMITED EDITION Made in the USA Magpul FDE Mil-Spec 7075 T6 Upper Receiver Forward Assist Timber Creek Outdoors Billet Dust Cover - OD Green 10.5" 1:7 Twist 4150 Barrel with Black...$358.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY 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 NATO Carbine Length...Sale: $219.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - SIG PINK
Sale: $269.00MSRP: $349.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - SIG PINK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para A2 Flash Hider 15" Free Float M-LOK...Sale: $269.00MSRP: $349.00