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
10.5" 5.56mm with 9" M-Lok Pistol Kit OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - OD Green OD Green Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black Nitride...Sale: $439.00MSRP: $579.00 -
ALWAYS ARMED 10.5" .300 BLACKOUT TR SERIES WITH TRINITY FORCE SIGHTS PISTOL KIT - BLACK ANODIZED
$489.00Always Armed 10.5" .300 Blackout TRX Series with Trinity Force Sights Pistol Kit - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride...$489.00 -
ALWAYS ARMED 10.5" 5.56 NATO UPPER RECEIVER WITH 12" MLOK RAIL & TEQUILA SUNRISE FLASH CAN - BLACK
$299.00ALWAYS ARMED 10.5" 5.56 NATO FLAHS CAN 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 in 5.56 NATO Carbine Length Gas System ...$299.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK
Sale: $209.00MSRP: $299.00ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK Made in the USA 16" 416R Stainless Steel Barrel Chambered in 9X19 Para 15" BX Series Free Floating MLOK Rail Black Anodized Finish 16 Inch 9mm Upper Receiver A2 Muzzle Device -...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED Made in the USA Mil Spec AR15 9mm Flash Can Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4" TR Series Free Float M-LOK Rail Flash...Sale: $189.00MSRP: $269.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO PISTOL KIT - MAGPUL FDE
Sale: $359.00MSRP: $499.00Always Armed 7.5" 5.56 NATO Pistol Kit - Magpul FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Pistol Length Gas System .750 Low...Sale: $359.00MSRP: $499.00 -
On 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 10.5" 5.56 NATO UPPER RECEIVER - BURNT BRONZE
Sale: $209.00MSRP: $299.00ALWAYS ARMED OCTO SERIES 10.5" 5.56 NATO UPPER RECEIVER - BURNT BRONZE Made in the USA Burnt Bronze Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:7 Twist Barrel...Sale: $209.00MSRP: $299.00 -
On Sale
Ghost Firearms 5.5" 9mm 1:10 HBAR Elite Barreled Upper - 7" M-LOK Rail - Flash Can - Zombie Green
Sale: $249.00MSRP: $329.00Ghost Firearms 5.5" Flash Can Upper with 7" Rail - Zombie Green Barrel - Length 5.5"/Black Nitride Finish Barrel Material - 4150 Steel 9mm Luger Gas System Type Blowback 7" M-LOK Free Float Rail Flash Can Muzzle Device Twist...Sale: $249.00MSRP: $329.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - FDE
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Magpul Flat Dark Earth Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:8 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) .750 Low Profile Gas Block...Sale: $449.00MSRP: $599.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - Black
Sale: $349.00MSRP: $419.00Grid Defense 20" .350 Legend Upper Receiver - Black Hard Coat Black Anodized Chambered in .350 Legend 14" Free Float M-Lok Rail 20" 1:16 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6...Sale: $349.00MSRP: $419.00 -
On Sale
Grid Defense 7.5" 5.56 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver Finished in Tungsten Gray Cerakote AR15 Skeletonized Upper Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 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 Stainless Steel 16" 5.56 Upper Receiver - OD Green
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - OD Green OD Green Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Carbine Length Gas System Grid Defense 14" M-Lok Free...Sale: $329.00MSRP: $429.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $219.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN 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 Can Muzzle Device Zombie Green Cerakote FinishSale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT UPPER RECEIVER - ZOMBIE GREEN Made in the USA Zombie Green Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:8 Twist Barrel with...Sale: $219.00MSRP: $319.00 -
Out of stockOn 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 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit- BURNT BRONZE
Sale: $459.00MSRP: $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: $459.00MSRP: $729.00 -
Out of stock
Ghost Firearms • Magpul 5.56 A2 Complete Rifle Kit Minus Lower
$499.00Ghost Firearms Magpul™ A2 Rifle Kit comes with a complete A2 upper, LPK, and Magpul™ Moe Stock assembly. Everything needed to build an AR-15 / M4 rifle minus the lower receiver. UPPER: Ghost Firearms...$499.00 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel Pistol Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid...Sale: $329.00MSRP: $399.00 -
Grid Defense 16" 5.56 Quad Rail Upper Receiver with Stainless Steel 1:7 Barrel - Black
$419.00Grid Defense 16" 5.56 Quad Rail Upper Receiver with Stainless Steel Barrel - Black Black Anodized Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 416R Stainless Steel Barrel Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper...$419.00