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
Grid Defense 6" .300 Blackout Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 6" .300 Blackout Pistol Upper Receiver - Flat Dark Earth Chambered in .300 Blackout 6" 1:7 Twist 4150 Light HBar Barrel - Black Nitride 7075-T6 Milspec Upper Receiver Pistol Length Gas System .750 Low Profile Gas Block Dimpled...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 9" .22LR Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR Upper Receiver - Tungsten Gray 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 Tungsten Gray...Sale: $299.00MSRP: $379.00 -
Out of stockOn Sale
Grid Defense GX2 7.5" .300 Blackout Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense GX2 7.5" .300 Blackout Flash Can Upper Mil-Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 M4 Barrel - Black Nitride Chambered in .300 Blackout 9" Grid Defense GX2 Octagon M-Lok Rail Dimpled Flash Can Pistol Length Gas System Made in...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - OD Green Finished in Magpul OD Green Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Black A2 Muzzle Device Pistol...Sale: $299.00MSRP: $379.00 -
On 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 Stainless Steel Light HBar Barrel Pistol Length Gas System...Sale: $299.00MSRP: $399.00 -
On Sale
ALWAYS ARMED JESTER 16" 9MM RIFLE KIT - FDE
Sale: $349.00MSRP: $509.00Always Armed Jester 16" 9mm Rifle Kit - FDE 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 9mm A2 Flash Hider 15" Jester Free Float M-LOK Hand...Sale: $349.00MSRP: $509.00 -
On Sale
ALWAYS ARMED QUAD MID LENGTH 16" 5.56 NATO RIFLE KIT - FDE
Sale: $409.00MSRP: $639.00ALWAYS ARMED QUAD MIDLENGTH 16" 5.56 NATO RIFLE KIT - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" Mid Length 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid Length Gas...Sale: $409.00MSRP: $639.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - OD GREEN
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - OD GREEN Finished in OD Green Cerakote Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle Device Mil-Spec 7075-T6...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 16" 5.56 Mid Length with 11" Rail Rifle Kit - FDE
Sale: $449.00MSRP: $599.00Ghost Firearms 16" 5.56 Mid Length Rifle Kit - FDE Flat Dark Earth (FDE) Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 16" 1:7 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost 18" 350 Legend Rifle Kit - OD Green
Sale: $449.00MSRP: $519.00Ghost 18" 350 Legend Rifle Kit - OD Green 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...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 9" .22LR Pistol Kit - OD Green
Sale: $480.00MSRP: $599.00Ghost 9" .22LR Pistol Kit - OD Green 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 .22...Sale: $480.00MSRP: $599.00 -
Out of stock
GHOST FIREARMS 16" 5.56 FRONT SIGHT UPPER WITH BCG/CH - FDE
$449.00GHOST FIREARMS 16" 5.56 FRONT SIGHT UPPER WITH BCG/CH - FDE Made in the USA 16" 5.56 NATO Barrel BCG and Charging Handle Included Magpul FDE Hand Guard A2 Muzzle Device Black Anodized Mil Spec Upper Receiver$449.00 -
On Sale
Grid Defense 7.5" 7.62x39 Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 7.62x39 Upper Receiver - OD Green 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 Hider Chambered in 7.62x39 Finished...Sale: $299.00MSRP: $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 HEX Stainless Steel 16" .223 Wylde Upper Receiver - FDE
Sale: $339.00MSRP: $409.00Grid Defense HEX Stainless Steel 16" .223 Wylde Upper Receiver - FDE Flat Dark Earth Cerakote Finish Chambered in .223 Wylde 16" 416R Stainless Steel Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch Black A2 Muzzle Device Carbine Length Gas...Sale: $339.00MSRP: $409.00 -
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 Hand Guard Carbine Length Gas System 10.5" 1:7...Sale: $299.00MSRP: $399.00 -
On Sale
Ghost 16" 5.56 Mid Length with 11" Rail Rifle Kit - OD Green
Sale: $443.33MSRP: $599.00Ghost Firearms 16" 5.56 Mid Length Rifle Kit - OD Green Finished in Olive Drab Green Cerakote Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 16" 1:7 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $443.33MSRP: $599.00 -
On Sale
Ghost 9" .22LR Pistol Kit - FDE
Sale: $480.00MSRP: $599.00Ghost 9" .22LR Pistol Kit - FDE 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 .22 Long...Sale: $480.00MSRP: $599.00 -
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 -
Out of stockOn Sale
Grid Defense 20" 6.5 Grendel Upper Receiver - OD Green
Sale: $329.00MSRP: $419.00Grid Defense 20" 6.5 Grendel Upper Receiver - OD Green Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free Float Handguard Finished in OD Green...Sale: $329.00MSRP: $419.00