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
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - MAGPUL FDE
Sale: $379.00MSRP: $529.00Always Armed 16" 300 Blackout Rifle Kit - FDE Made in the USA Rifle Butt Stock Carbine Buffer Tube Assembly Mil-Spec Lower Parts Kit Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride...Sale: $379.00MSRP: $529.00 -
Out of stock
ALWAYS ARMED 16" 9MM UPPER RECEIVER WITH 15" KEYMOD HAND GUARD
$279.00Always Armed 16" 9MM Upper Receiver With 15" Keymod Hand Guard Made in the USA Mil-Spec Upper Receiver with Dust Cover and Forward Assist 16" 4150 Barrel Chambered in 9x19 PARA 15" Free Floating Key Mod Hand Guard Black Anodized Finish A2 Muzzle Device$279.00 -
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 Elite 16" Upper 5.56 Nato With Matching Flash Can - FDE
Sale: $299.00MSRP: $369.00Ghost Firearms Elite 16" 5.56 Upper Receiver With Flash Can - FDE Ghost Elite 16 Upper Chambered in 5.56x45 NATO (5.56/.223) 5.5" Flash Can finished in FDE 16" 1:7 Twist 4150 M4 Barrel Black Nitride 1/2x28 Muzzle Thread...Sale: $299.00MSRP: $369.00 -
On Sale
GHOST FIREARMS ELITE 16" UPPER 300 AAC BLACKOUT - TACTICAL GRAPE
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" .300 AAC Upper -Tactical Grape Tactical Grape Cerakote Finished Chambered in 300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms...Sale: $269.00MSRP: $349.00 -
On Sale
Ghost Firearms 10.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - OD Green
Sale: $449.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Magpul Olive Drab Green Cerakote Milspec 7075-T6 Upper Receiver 10.5" 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
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver Pistol Kit - Burnt Bronze
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Burnt Bronze Cerakote Ghost Firearms 7.5" Upper Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block...Sale: $449.00MSRP: $599.00 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Magpul OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Magpul OD Green Magpul OD Green Cerakote Finish Chambered in .300 Blackout 14" M-Lok Quad Rail 16" 1:8 4150 Barrel - Black Nitride Pistol Length Gas System A2 Flash Hider Mil-Spec...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER WITH 15" TR RAIL TRINITY FORCE SIGHTS RIFLE KIT - FDE
Sale: $389.00MSRP: $519.98Always Armed 16" 5.56 NATO Upper With 15" TR Rail Trinity Force Sights Rifle Kit - FDE 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...Sale: $389.00MSRP: $519.98 -
Out of stock
Ghost Elite 10.5" 5.56 Nato OD Green w/ Stainless Steel Upgrade & Nickel Boron BCG black charging handle
$449.00Ghost Firearms Elite 10.5" 5.56 Complete Upper - OD Green Made in the USA Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider Upgraded Stainless Steel 416R 10.5" 1:7 Twist M4 Barrel Carbine Length Gas System Ghost Firearms 9"...$449.00 -
On Sale
Ghost Elite 10.5" 7.62X39 Upper Receiver - Burnt Bronze
Sale: $259.00MSRP: $329.00Ghost Elite 10.5" 7.62x39 Upper - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in 7.62x39 7075-T6 Milspec Upper Receiver 10.5" 1:10 Twist 4150 Steel Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System A2 Flash Hider Made...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Firearms Elite 16"Upper 9MM - Tactical Grape
Sale: $299.00MSRP: $349.00Ghost Firearms Elite 16" Upper 9MM Tactical Grape Cerakote Finished Chambered in 9x19 Para A2 Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 14" M-Lok Free...Sale: $299.00MSRP: $349.00 -
On Sale
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" 5.56 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 4150 M4 Profile Barrel - Black Nitride Chambered in 5.56x45 NATO Carbine Length Gas System ...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Tungsten Gray Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System A2 Flash Hider...Sale: $299.00MSRP: $379.00 -
Out of stock
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - Flat Dark Earth
$429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - Flat Dark Earth FDE 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...$429.00 -
On Sale
ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL
Sale: $189.00MSRP: $299.00ALWAYS ARMED 10.5" 300 BLACKOUT BLACK UPPER RECEIVER WITH KEYMOD FDE HANDRAIL Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist Upper Finished in Hard Coat Black Anodize 10.5" 1:8 Twist 4150 Barrel with Black...Sale: $189.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY 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...Sale: $219.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 16" 7.62x39 BX SERIES UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED 16" 7.62x39 BX SERIES UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7.62x39 Carbine Length Gas System .750...Sale: $199.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 4.5" 9MM TR SERIES FLASH CAN COMPLETE UPPER RECEIVER WITH BCG CH - BLACK
Sale: $279.00MSRP: $427.00ALWAYS ARMED 4.5" 9MM TR SERIES FLASH CAN COMPLETE UPPER RECEIVER WITH BCG CH - BLACK 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: $279.00MSRP: $427.00 -
On Sale
ALWAYS ARMED 7.5" 9MM STAINLESS STEEL UPPER RECEIVER - BURNT BRONZE
Sale: $239.00MSRP: $319.00ALWAYS ARMED 7.5" 9MM STAINLESS STEEL UPPER RECEIVER - BURNT BRONZE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para A2 Flash...Sale: $239.00MSRP: $319.00