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 10.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length Gas...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 10.5" 5.56 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Tungsten Gray Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash Hider...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Quad Rail Upper Receiver - FDE FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System Grid Defense 14" M-Lok Free Float Quad...Sale: $329.00MSRP: $399.00 -
On Sale
GRID DEFENSE 7.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Zombie Green Cerakote Finish Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride (1/2x36 Thread Pattern) 9" Grid Defense Octagon M-Lok Rail Dimpled Flash...Sale: $329.00MSRP: $399.00 -
On Sale
10.5" 5.56mm with 9" M-Lok Pistol Kit Blue Titanium
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - Blue Titanium Premium AR-15 pistol build kits, the M-Lok pistol kit with A2 flash can. Finished in blue titanium cerakote. Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging...Sale: $439.00MSRP: $579.00 -
On Sale
ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - SIG PINK
Sale: $219.00MSRP: $319.00Always Armed 16" 300 Blackout Upper Receiver - Sig Pink Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas System .750...Sale: $219.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 5.5" 9MM SS FLASH CAN OCTO SERIES UPPER RECEIVER - BURNT BRONZE
Sale: $199.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM SS FLASH CAN UPPER RECEIVER - BURNT BRONZE 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 Burnt Bronze...Sale: $199.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $249.00ALWAYS ARMED 7.5" 5.56 NATO BX SERIES UPPER RECEIVER - BLACK ANODIZED 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...Sale: $189.00MSRP: $249.00 -
On Sale
GHOST 16" .308 WINCHESTER UPPER RECEIVER WITH 12" M-LOK RAIL - BLACK
Sale: $319.00MSRP: $449.00GHOST 16" .308 WINCHESTER UPPER RECEIVER WITH 12" M-LOK RAIL - BLACK DPMS Pattern Upper (Low Profile) Mil-Spec Dust Cover and Forward Assist 16" 4150 HBAR Contour Barrel - Black Nitride Mid-length gas system Chambered in .308 Winchester with a 1:10...Sale: $319.00MSRP: $449.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit - Blue Titanium
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Blue Titanium Cerakote Chambered in 9x19 Para 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 1/2x36 Thread Pattern 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $459.00MSRP: $729.00 -
On Sale
GHOST FIREARMS 7.5" 5.56mm with 7" M-Lok Pistol Kit - FDE
Sale: $439.00MSRP: $579.00GHOST FIREARMS 7.5" 5.56 NATO PISTOL KIT - FDE Finished in Flat Dark Earth Cerakote Chambered in .223/5.56 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 1/2x28 7.5" 1:7 Twist 4150 Chrome Moly Steel Barrel...Sale: $439.00MSRP: $579.00 -
On Sale
Ghost Firearms Elite 16" Upper 7.62X39 - OD GREEN
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" Upper - OD GREEN Magpul OD Green Cerakote Finished Chambered in 7.62x39 A2 Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost...Sale: $269.00MSRP: $349.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL - FDE
Sale: $219.00MSRP: $329.00ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL - FDE Made in the USA 16" 4150 Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Quad Rail Magpul Flat Dark Earth Cerakote Finish Carbine Length Gas System A2 Muzzle Device 1:7 Twist...Sale: $219.00MSRP: $329.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK ANODIZED
Sale: $179.00MSRP: $279.00ALWAYS ARMED 7.5" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56 NATO Pistol Length...Sale: $179.00MSRP: $279.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO TR SERIES PISTOL KIT - BLACK ANODIZED
Sale: $339.00MSRP: $459.00Always Armed 7.5" 5.56 NATO TR Series Pistol Kit - Black Anodized 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...Sale: $339.00MSRP: $459.00 -
On Sale
ALWAYS ARMED 7.5" 7.62x29 BX SERIES FLASH CAN UPPER RECEIVER - BLACK
Sale: $209.00MSRP: $299.00ALWAYS ARMED 7.5" 7.62x29 BX SERIES FLASH CAN UPPER RECEIVER - BLACK Hard Coat Black Anodized Finish Mil-Spec AR15 Upper Receiver with Dust Cover and Forward Assist 9" BX Series Free Float M-LOK Rail 7.5" 1:10 Twist 4150 Barrel with Black Nitride Finish...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO RIFLE KIT - BLACK
Sale: $349.00MSRP: $469.00ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO RIFLE KIT 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 .750 Low...Sale: $349.00MSRP: $469.00 -
On Sale
Ghost 16" .308 Winchester Billet Upper - FDE
Sale: $399.00MSRP: $529.00Ghost Firearms 16" .308 Winchester Billet Upper - FDE Billet DPMS High Profile Pattern upper 16" 4150 chrome moly HBAR contour barrel, mid-length gas system Chambered in .308 Winchester with a 1:10 twist rate 5/8x24 with A2 flash hider 15" M-LOK Free...Sale: $399.00MSRP: $529.00 -
On Sale
GHOST FIREARMS 7.5" STAINLESS STEEL 9MM FLASH CAN UPPER RECEIVER - BLACK
Sale: $249.00MSRP: $329.00GHOST FIREARMS 7.5" STAINLESS STEEL 9MM FLASH CAN UPPER RECEIVER - BLACK 7.5" 416R Stainless Steel Barrel 1/2x36 Thread Pattern Chambered in 9x19 Parabellum Gas System Type Blowback 9" M-LOK Free Float Rail Flash Can Twist...Sale: $249.00MSRP: $329.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length Gas...Sale: $299.00MSRP: $379.00