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
Ghost Firearms 10.5" 5.56 NATO Pistol Kit - FDE
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 NATO Pistol Kit - FDE Flat Dark Earth (FDE) Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging HandleSale: $439.00MSRP: $579.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - Tungsten Gray
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Tungsten Gray Cerakote Milspec 7075-T6 Upper Receiver Upper Receiver Pistol Kit 7.5" 1:8 4150 Light HBar Barrel - Black...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 7.5" 9mm with M-Lok 7" Pistol Kit - Burnt Bronze
Sale: $449.00MSRP: $699.00Ghost Firearms 7.5" Pistol Kit - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging HandleSale: $449.00MSRP: $699.00 -
Out of stockOn Sale
BLEM ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $269.00BLEMISHED ALWAYS ARMED OCT2 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" 1:7 Twist 4150 Barrel with Black...Sale: $179.00MSRP: $269.00 -
On Sale
Ghost Firearms 16" 300 AAC Blackout with 14" M-Lok Rifle Kit - FDE
Sale: $449.00MSRP: $599.00Ghost Firearms 16".300 AAC Rifle Kit - FDE Flat Dark Earth (FDE) Cerakote Finish Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2Sale: $449.00MSRP: $599.00 -
Out of stock
Ghost Vital 16" Upper 5.56 Nato with BCG/Charging Handle, AXE Brake and Sights
$449.00Ghost Firearms Vital 16" Upper Chambered in 5.56x45 NATO (5.56/.223) AXE Brake 16" 1:7 or 1:8 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firea$449.00 -
Out of stockOn Sale
ALWAYS ARMED 5.5" 9MM OCTO GEN 2 UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK
Sale: $219.00MSRP: $299.00ALWAYS ARMED 5.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 5.5" 1:10 Twist 416R Stainless Steel Barrel 4.25" Free Float M-LOK Rail Flash Can Muzzle...Sale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - BLACK ANODIZED
Sale: $339.00MSRP: $459.00Always Armed 7.5" 300 Blackout Pistol Kit - Black Anodized 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...Sale: $339.00MSRP: $459.00 -
Out of stockOn Sale
GHOST ELITE 10.5" UPPER 5.56 NATO - TACTICAL GRAPE
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 10.5" Upper - Tactical Grape Made in the USA Chambered in 556 NATO 5.56 Nato Upper Receiver A2 Flash Hider 10.5" 1:7 or 1:8 Twist 4150 M4 Barrel Black Nitride Carbine Length...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Firearms Vital 16" 9mm Upper Receiver - Black
Sale: $224.00MSRP: $299.00Ghost 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"...Sale: $224.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 10.5" 7.62X39 BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $279.00ALWAYS ARMED 10.5" 7.62X39 BX SERIES UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:10 Twist 4150 Barrel with Black Nitride Finish...Sale: $189.00MSRP: $279.00 -
On Sale
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver Pistol Kit - Black Anodized
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit The new AR15 build kits with Mil-Spec complete upper receiver and flash can. Hard Coat Black Anodized Finish Milspec 7075-T6 Upper...Sale: $449.00MSRP: $599.00 -
Out of stockOn Sale
Grid Defense Suppressor Ready 10.5" .300 Blackout Upper Receiver
Sale: $329.00MSRP: $399.00Grid Defense Suppressor Ready 10.5" .300 Blackout Upper Upper Specifications Mil-Spec Upper Receiver Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 9"...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 9MM BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 7.5" 9MM 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...Sale: $189.00MSRP: $269.00 -
On Sale
GRID DEFENSE 5.5" 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN
Sale: $329.00MSRP: $399.00GRID DEFENSE 5.5" UPPER RECEIVER - 9MM FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA Dimpled Flash Can - 1/2x36 Thread Pattern 7" Grid Defense...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Burnt Bronze Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 12" M-LOK RAIL, POP UP SIGHTS AND ANGLED FOREGRIP
Sale: $249.00MSRP: $329.00ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 12" M-LOK RAIL, POP UP SIGHTS AND ANGLED FOREGRIP Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist...Sale: $249.00MSRP: $329.00 -
On Sale
BLEM ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $169.00MSRP: $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...Sale: $169.00MSRP: $299.00 -
On Sale
Ghost 10.5" 5.56 Pistol Kit - Burnt Bronze
Sale: $439.00MSRP: $579.00Ghost 10.5" 5.56 Pistol Kit - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash HideSale: $439.00MSRP: $579.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black...Sale: $299.00MSRP: $379.00