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
BLEM Ghost Firearms Vital 16" 9mm Upper Receiver - Black
Sale: $189.00MSRP: $299.00Blemished Ghost Firearms Vital 16" 9MM Upper - Black Chambered in 9x19 Para A2 Birdcage Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost...Sale: $189.00MSRP: $299.00 -
On Sale
Ghost Firearms 16" 9mm with M-Lok 11" Rifle Kit - Black
Sale: $579.00MSRP: $679.00Ghost Firearms 16" 9MM Rifle Kit - Black Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Chrome Moly Steel Barrel Black Nitride Colt...Sale: $579.00MSRP: $679.00 -
On Sale
Ghost Firearms Vital 10.5" 7.62x39 Pistol Kit
Sale: $479.00MSRP: $539.00Ghost Firearms Vital 10.5" Upper Premium AR-15 complete pistol kit Chambered in 7.62X39 A2 Birdcage Flash Hider 10.5" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost Firearms 9" M-Lok Free...Sale: $479.00MSRP: $539.00 -
Ghost Vital 10.5" Upper 5.56 Nato With Stainless Steel Barrel with BCG & Charging Handle
$399.00GHOST FIREARMS VITAL 10.5" 5.56 UPPER RECEIVER - BLACK Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider (Black) 10.5" 1:7 Twist 416R M4 Stainless Steel Barrel Carbine Length Gas System Ghost Firearms 9"...$399.00 -
On Sale
Ghost Vital 16" Upper 5.56 NATO With 11" Rail - Black
Sale: $239.00MSRP: $299.00Ghost Vital 16" 5.56 NATO With 11" Rail - Black Chambered in 5.56 NATO 16" 1:7 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper Receiver Mil-Spec...Sale: $239.00MSRP: $299.00 -
Out of stockOn Sale
Grid Defense 18" .308 Winchester Billet Upper - Black
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - Black Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle Device 15"...Sale: $439.00MSRP: $579.00 -
On Sale
Grid Defense 7.5" 5.56 NATO Upper Receiver - Black
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 NATO Upper Receiver Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Hard Coat Black Anodized Finish Pistol Length Gas System A2 Flash Hider Chambered...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 7.5" 7.62x39 BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 7.5" 7.62x39 BX SERIES UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7.62x39 Pistol Length Gas...Sale: $189.00MSRP: $269.00 -
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 SERIES 16" .300 BLACKOUT RIFLE KIT - BLACK
Sale: $349.00MSRP: $469.00ALWAYS ARMED OCTO SERIES 16" .300 BLACKOUT RIFLE KIT 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: $349.00MSRP: $469.00 -
On Sale
GHOST 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $249.00MSRP: $309.00GHOST 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK Mil-Spec 7075 Forged Aluminum Upper Receiver 14" Ghost Firearms M-Lok Rail Black Anodized Finish 16" 1:7 Twist 416R Stainless Steel Barrel Stainless Steel A2 Birdcage Muzzle...Sale: $249.00MSRP: $309.00 -
On Sale
Ghost Firearms Vital 16" 9mm Stainless Steel Upper Receiver - Black Anodized
Sale: $239.00MSRP: $299.00Ghost Firearms Vital 16" 9MM Stainless Steel Upper - Black Chambered in 9x19 Para A2 Birdcage Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 416R Stainless Steel Barrel Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost...Sale: $239.00MSRP: $299.00 -
On Sale
Ghost Vital 16" Black Upper 5.56 NATO With FDE 11" Rail
Sale: $259.00MSRP: $329.00Ghost Vital 16" Black Upper 5.56 NATO With 11" FDE Rail - Black Chambered in 5.56 NATO 16" 1:7 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Finished in Flat Dark Earth...Sale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 18" 6mm ARC Upper Receiver - Black
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - Black Hard Coat Black Anodized Chambered in 6mm ARC 14" Free Float M-Lok Rail 18" 4150 Heavy Profile Barrel - Black Nitride 1:8 Twist Rate .750 Mid Length Gas System 5/8x24 Thread Pitch A2 Flash...Sale: $329.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense 20" .308 Winchester Billet Upper - Black
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - Black 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 Device 15" M-LOK Free Floating Rail Black Anodized...Sale: $449.00MSRP: $589.00 -
On Sale
GRID DEFENSE 7.5" 9MM STAINLESS STEEL FLASH CAN UPPER RECEIVER - BLACK ANODIZED
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" 9MM STAINLESS STEEL FLASH CAN UPPER RECEIVER - BLACK ANODIZED Hard Coat Black Anodized Finish Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 416R Stainless Steel Barrel 9" Grid Defense Octagon M-Lok Rail Dimpled Flash...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" .308 WIN BILLET UPPER RECEIVER - BLACK
Sale: $299.00MSRP: $429.00ALWAYS ARMED 16" .308 WIN BILLET UPPER RECEIVER - BLACK Billet DPMS Pattern High Profile Upper Receiver 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash...Sale: $299.00MSRP: $429.00 -
Out of stock
Always Armed 16" Upper Receiver with Straight Fluted Stainless Steel Barrel and 12" Key Mod Rail
$309.00Always Armed 16" Upper Receiver with Straight Fluted Stainless Steel Barrel and 12" Key Mod Rail Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 416R Stainless Steel Barrel with Straight...$309.00 -
On Sale
BLEM ALWAYS ARMED 7.5" 5.56 NATO OCT2 SERIES UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $249.00BLEM ALWAYS ARMED 7.5" 5.56 NATO TR SERIES UPPER RECEIVER - BLACK 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...Sale: $179.00MSRP: $249.00 -
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