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.
-
Out of stockOn Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 15" KEYMOD HAND GUARD - BLACK
Sale: $209.00MSRP: $279.00Always Armed 16" 9MM Stainless Steel Upper Receiver With 15" Keymod Hand Guard Made in the USA Mil-Spec Upper Receiver with Dust Cover and Forward Assist 16" 416R Stainless Steel Barrel Chambered in 9x19 PARA 15" Free Floating Key Mod Hand Guard Black...Sale: $209.00MSRP: $279.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - MAGPUL FDE
Sale: $439.00MSRP: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Magpul FDE Made in the USA Mil-Spec Lower Parts Kit Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 300...Sale: $439.00MSRP: $499.00 -
On Sale
ALWAYS ARMED BX SERIES 16" 5.56 NATO RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $469.00Always Armed BX Series 16" 5.56 NATO Rifle Kit - Black Anodized 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 Gas System...Sale: $349.00MSRP: $469.00 -
On Sale
ALWAYS ARMED OCTO SEREIS 7.5" 300 BLACKOUT UPPER RECEIVER WITH AXE BRAKE - TITANIUM
Sale: $249.00MSRP: $329.00ALWAYS ARMED OCTO SEREIS 7.5" 300 BLACKOUT UPPER RECEIVER WITH AXE BRAKE - TITANIUM Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout...Sale: $249.00MSRP: $329.00 -
Out of stockOn Sale
ALWAYS ARMED OCTO SERIES 5.5" 9MM SS FLASH CAN UPPER RECEIVER - FDE
Sale: $199.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - FDE Made in the USA Mil Spec AR15 Upper Receiver 1/2 x 36 thread pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel 7" Free Float M-LOK Rail Flash Can Muzzle Device Flat Dark Earth...Sale: $199.00MSRP: $319.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - PINK CHAMPAGNE
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - PINK CHAMPAGNE Made in the USA Pink Champagne Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:7 Twist Barrel with...Sale: $219.00MSRP: $319.00 -
Out of stockOn Sale
ALWAYS ARMED ULTRALIGHT SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $219.00MSRP: $319.00ALWAYS ARMED ULTRALIGHT SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" Pencil Profile 4150 Steel Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid...Sale: $219.00MSRP: $319.00 -
Out of stock
BLEM ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK
$299.00BLEM ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK Blemishes are cosmetic only and do NOT effect functionality Made in the USA 1/2 x 36 Thread Pattern 16" 416R Stainless Steel Barrel Chambered in 9X19 Para 15" Free Floating MLOK Rail Black...$299.00 -
On Sale
Ghost 20" .308 Winchester Billet Upper - Blue Titanium
Sale: $419.00MSRP: $549.00Ghost AR10 20" 308 Upper - Blue Titanium Billet DPMS Pattern High Profile Upper Receiver 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider 15" M-LOK Free Floating...Sale: $419.00MSRP: $549.00 -
Out of stock
Ghost Elite Stainless Steel 16" Upper .300 Blackout - Burnt Bronze
$379.00Ghost Elite Stainless Steel 16" 300 Blackout Upper Receiver - Burnt Bronze Burnt Bronze 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 System...$379.00 -
On Sale
Ghost Firearms 16" 7.62X39 With14" M-LOK Rail Rifle Kit - BLUE TITANIUM
Sale: $519.00MSRP: $659.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Finished in Blue Titanium Cerakote Chambered in 7.62x39 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail Carbine Length Gas System A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $519.00MSRP: $659.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit- BURNT BRONZE
Sale: $399.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Burnt Bronze Cerakote Chambered in 9x19 Para 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $399.00MSRP: $729.00 -
On Sale
Ghost Firearms 7.5" 300 Blackout with 7" M-Lok Pistol Kit Burnt Bronze
Sale: $439.00MSRP: $579.00GHOST FIREARMS 7.5" 300 Blackout Upper M-Lok Pistol Kit- BURNT BRONZE Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 7.5" 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $439.00MSRP: $579.00 -
Out of stock
GHOST FIREARMS 7.5" 5.56 FLASH CAN UPPER RECEIVER LIMITED EDITION - TITANIUM
$499.00GHOST FIREARMS 7.5" 5.56 FLASH CAN UPPER RECEIVER LIMITED EDITION - TITANIUM Finished in Titanium Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:7 416R Stainless Steel Barrel Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas System...$499.00 -
On Sale
Ghost Firearms 7.5" 5.56 Stainless Steel Flash Can Upper Receiver - Black
Sale: $289.00MSRP: $349.00GHOST FIREARMS 7.5" 5.56 STAINLESS STEEL FLASH CAN UPPER RECEIVER Proudly Made in the USA 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver 7.5" 1:7 Twist 416R Stainless Steel Barrel Pistol Length Gas System .750 Low Profile Gas Block Flash Can...Sale: $289.00MSRP: $349.00 -
On Sale
Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" UPPER - .300 BLACKOUT UPPER RECEIVER WITH FLASH CAN - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7...Sale: $329.00MSRP: $399.00 -
Out of stock
Grid Defense 10.5" 5.56 Upper Receiver with Stainless Steel Barrel - Tactical Grape
$409.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Purple Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4 Barrel 9" MLOK Hand Guard .750 Low Profile Gas Block Carbine Length Gas System A2 Flash...$409.00 -
Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - FDE
$414.00Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - Flat Dark Earth Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas...$414.00 -
Out of stock
Grid Defense 16" 5.56 Quad Rail Upper Receiver - Tactical Grape
$399.00Grid Defense 16" 5.56 Quad Rail Upper Receiver - Tactical Grape Tactical Grape Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper Receiver$399.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Periwinkle
Sale: $329.00MSRP: $399.00Grid 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 Cerakote...Sale: $329.00MSRP: $399.00