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 20" .308 Winchester Billet Upper - OD Green
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - OD Green 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 Muzzle...Sale: $449.00MSRP: $589.00 -
On Sale
Grid Defense 20" 6.5 Grendel Upper Receiver - Black
Sale: $329.00MSRP: $419.00Grid Defense 20" 6.5 Grendel Upper Receiver - Black Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free...Sale: $329.00MSRP: $419.00 -
On Sale
Grid Defense 20" 6.5 Grendel Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $419.00Grid Defense 20" 6.5 Grendel Upper Receiver - Blue Titanium Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14"...Sale: $329.00MSRP: $419.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Tactical Grape
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Purple Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Limited Edition 5.56 Flash Can Upper Receiver - Tungsten Gray/Burnt Bronze
$505.93Grid Defense Limited Edition 5.56 Flash Can Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote 7075-T6 MilSpec Upper Receiver 7.5" 1:7 Twist 4150 Barrel - Black Nitride Chambered...$505.93 -
Out of stock
Grid Defense Limited Edition 5.56 Flash Can Upper Receiver - Tungsten Gray/Red
$510.89Grid Defense Limited Edition 5.56 Flash Can Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote 7075-T6 MilSpec Upper Receiver 7.5" 1:7 Twist 4150 Barrel - Black Nitride Chambered...$510.89 -
Out of stock
Grid Defense Limited Edition 7.5" 5.56 Flash Can Upper With Timber Creek Accessories - Tequila Sunrise
$458.98Grid Defense 7.5" 5.56 NATO Flash Can Upper Receiver - Tequila Sunrise Finished in Tequila Sunrise Cerakote 5.56 Flash Can Upper Made in the USA 1:7 Twist 7.5" 4150 M4 Barrel - Black Nitride 9"...$458.98 -
Out of stock
Grid Defense Limited Edition Stainless Steel 16" 5.56 Upper Receiver with Nickel Boron BCG and Red Strike Industries Accessories
$691.85Grid Defense Limited Edition Stainless Steel 16" 5.56 Upper Receiver Blue Titanium Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R Stainless Steel Barrel -...$691.85 -
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...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Stainless Steel 10.5" .300 Blackout Upper Receiver - OD Green
$399.00Grid Defense 10.5" .300 Blackout Stainless Steel Upper Receiver Finished in Magpul Olive Drab Green Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in ...$399.00 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Black
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Black Hard Coat Black Anodized Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 10.5" 1:7 Twist 416R Stainless Steel Barrel...Sale: $299.00MSRP: $399.00 -
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - Tactical Grape
$429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - Tactical Grape Tactical Grape Cerakote Finish Chambered in 5.56 NATO 5.56 Upper Receiver Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R...$429.00 -
Out of stock
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver With MBUS Sights - Tungsten Gray
$496.50Grid 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...$496.50 -
Out of stock
.22LR CONVERSION KIT - 9" BARREL, .22 BOLT CARRIER, MIL-SPEC AR-15 CHARGING HANDLE, AND 25 ROUND MAGAZINE
$349.00.22LR CONVERSION KIT - 9" BARREL, .22 BOLT CARRIER, MIL-SPEC AR-15 CHARGING HANDLE, AND 25 ROUND MAGAZINE Mil-Spec Charging Handle - AR15 Black Anodized 6061 T6 Aluminum Cycle Loads With Ease Using...$349.00 -
On Sale
ALWAYS ARMED 10.5" 300 BLACKOUT PISTOL KIT - BLACK ANODIZED
Sale: $339.00MSRP: $479.00Always Armed 10.5" 300 Blackout Rifle Kit - Black Anodized Made in the USA Mil-Spec Lower Parts Kit Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel...Sale: $339.00MSRP: $479.00 -
ALWAYS ARMED 10.5" 5.56 NATO GEN 1 PISTOL KIT
$509.00 - $529.00Always Armed 10.5" 5.56 NATO Gen 1 Pistol Kit Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in...$509.00 - $529.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO GEN 1 UPPER RECEIVER
$189.00 - $209.00Always Armed 10.5" 5.56 NATO Gen 1 Upper Receiver Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered...$189.00 - $209.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO STAINLESS STEEL GEN 1 UPPER RECEIVER
$189.00 - $209.00Always Armed 10.5" 5.56 NATO Stainless Steel Gen 1 Upper Receiver Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 416R Stainless Steel...$189.00 - $209.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO TR SERIES UPPER RECEIVER
$189.00 - $209.00Always Armed 10.5" 5.56 NATO TR Series Upper Receiver Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride...$189.00 - $209.00