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" 8.6 Blackout Billet Upper - OD Green
Sale: $429.00MSRP: $569.00Grid Defense 16" 8.6 Blackout Billet Upper - OD Green 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...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 16" 9mm Stainless Steel Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Milspec 7075-T6 Upper Receiver 16" 416R Stainless Steel Barrel with 1:10 Twist Rate 1/2x36 Thread...Sale: $329.00MSRP: $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...Sale: $329.00MSRP: $419.00 -
On Sale
Grid Defense 20" .308 Winchester Billet Upper - Tungsten Gray
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - Tungsten Gray 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...Sale: $449.00MSRP: $589.00 -
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...Sale: $349.00MSRP: $419.00 -
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...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Stainless Steel 10.5" .300 Blackout Upper Receiver - Blue Titanium
$399.00Grid Defense 10.5" .300 Blackout Upper Receiver The premium quality Mil-Spec uppers at best online prices, the new .300 blackout upper receiver, a premium product by Grid Defense. Finished in Blue...$399.00 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - OD Green
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver Magpul Olive Drab Green Cerakote Finish Chambered in 5.56 NATO Grid Defense Mil Spec 7075 T6 Upper Receiver Grid Defense 9" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 300 Blackout Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R...Sale: $329.00MSRP: $429.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Magpul Olive Drab Green Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 7.5" 1:8 Twist 416R...Sale: $299.00MSRP: $399.00 -
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...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...Sale: $299.00MSRP: $399.00 -
ALWAYS ARMED 16" 7.62X39 RIFLE KIT - TITANIUM
$579.00Always Armed 16" 7.62X39 Rifle Kit - Titanium Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7...$579.00 -
Out of stockOn Sale
ALWAYS ARMED 16" STAINLESS STEEL 9MM LIGHTWEIGHT RIFLE KIT - BLACK
Sale: $349.00MSRP: $519.00Always Armed 16" Stainless Steel 9MM Lightweight Rifle Kit - Black Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 16" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para...Sale: $349.00MSRP: $519.00 -
Out of stockOn Sale
ALWAYS ARMED 18" .308 WIN UPPER RECEIVER WITH 15" M-LOK - BAZOOKA GREEN
Sale: $339.00MSRP: $469.00ALWAYS ARMED 18" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread...Sale: $339.00MSRP: $469.00 -
Out of stockOn Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - TITANIUM
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - TITANIUM 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...Sale: $219.00MSRP: $299.00 -
On Sale
Always Armed Gen 1 16" 5.56 Upper Receiver Without Forward Assist
Sale: $189.00MSRP: $319.00Streamline your full-length rifle build with the Always Armed Gen 1 16" 5.56 Upper Receiver Without Forward Assist. Built for shooters who prefer a smooth, snag-free profile, this complete upper...Sale: $189.00MSRP: $319.00 -
Out of stock
Always Armed Limited Edition Red/Blue 7.5" Upper 9MM with Stainless Steel Barrel
$299.00Always Armed Limited Edition 7.5"9MM Upper Receiver Made in the USA Red Cerakoted Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:10 Twist 416R Stainless Steel Barrel...$299.00 -
Out of stockOn Sale
ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL AND AXE BRAKE - BLACK
Sale: $299.00MSRP: $359.00ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER Made in the USA Hard Coat Black Anodized Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK...Sale: $299.00MSRP: $359.00 -
Out of stockOn Sale
Ghost 16" .308 Winchester Billet Upper - Blue Titanium
Sale: $399.00MSRP: $529.00Ghost 16" .308 Winchester Billet Upper - Blue Titanium Bilet DPMS Pattern High Profile Upper Receiver 16" 4150 Chrome Moly HBAR Contour Barrel Mid-Length Gas System Chambered in .308...Sale: $399.00MSRP: $529.00