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 Elite 10.5" 5.56 Flash Can Upper With FDE Flash Can - Flat Dark Earth
Sale: $279.00MSRP: $369.00Ghost Elite 10.5" 5.56 Flash Can Upper With FDE Flash Can - Flat Dark Earth FDE Smooth Flash Can 10.5" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost...Sale: $279.00MSRP: $369.00 -
Out of stock
Ghost Elite 16" Blue Titanium 5.56 Nato Diamond Dimpled Stainless Steel Barrel
$369.00Ghost Firearms Vital 16" Upper Chambered in 5.56x45 NATO (5.56/.223) Premium Stainless Steel AXE Break Installed 16" 1:8 Twist 416R M4 Diamond Dimpled Stainless Steel Barrel Carbine Length Gas System Ghost...$369.00 -
On Sale
Ghost Firearms 10.5" 5.56 Flash Can Upper Receiver Pistol Kit - Blue Titanium
Sale: $399.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Blue Titanium Cerakote Milspec 7075-T6 Upper Receiver 10.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System...Sale: $399.00MSRP: $599.00 -
On Sale
Ghost Firearms 16" .308 Winchester Billet Upper - Burnt Bronze
Sale: $399.00MSRP: $529.00Ghost Firearms 16" .308 Winchester Billet Upper - Burnt Bronze Billet DPMS Pattern High Profile Upper Receiver 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...Sale: $399.00MSRP: $529.00 -
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 -
Out of stockOn Sale
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver Pistol Kit - Tactical Grape
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Purple Cerakote 7.5 Upper Build Kit Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 7.5" 5.56mm with 7" M-Lok Pistol Kit - Burnt Bronze
Sale: $379.00MSRP: $579.00Ghost Firearms 7.5" 5.56 Pistol Kit - Burnt Bronze Burnt Bronze Cerakote Finished Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 7.5" 1:7 Twist 4150 Chrome Moly Steel...Sale: $379.00MSRP: $579.00 -
On Sale
Ghost Firearms 7.5" 5.56mm with 7" M-Lok Pistol Kit OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 7.5" Pistol Kit - OD Green OD Green Cerakote Finished Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-Spec Charging Handle A2 Flash Hider 7.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $439.00MSRP: $579.00 -
Out of stock
GHOST FIREARMS 7.5" FLASH CAN UPPER RECEIVER WITH FDE FLASH CAN AND LASER ENGRAVED DUST COVER
$359.00GHOST FIREARMS 7.5" FLASH CAN UPPER RECEIVER Hard Coat Black Anodized Finish Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas System Ghost...$359.00 -
Out of stock
Ghost Firearms Elite Stainless Steel 16" Upper .300 Blackout - Blue Titanium
$379.00Ghost Firearms Elite Stainless Steel 16" 300 Blackout Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas...$379.00 -
Out of stock
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - OD Green
$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...$429.00 -
Out of stockOn Sale
10.5" 5.56MM WITH 9" M-LOK PISTOL KIT - TACTICAL GRAPE
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - Tactical Grape Purple Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:7 or 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $439.00MSRP: $579.00 -
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 7.5" 300 BLACKOUT UPPER RECEIVER - SIG PINK
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout Upper Receiver - Sig Pink Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas System ...Sale: $209.00MSRP: $299.00 -
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 Finish Chambered in 9mm A2 Flash Hider 7" BX Series...Sale: $189.00MSRP: $269.00 -
On Sale
ALWAYS ARMED OCTO SERIES 10.5" 5.56 UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED OCTO SERIES 10.5" 5.56 UPPER RECEIVER - FDE Made in the USA Magpul FDE 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 with Black Nitride...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK TR Series Rail 10.5" 1:8 Twist Barrel with...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED TR SERIES 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER - BURNT BRONZE
Sale: $229.00MSRP: $319.00ALWAYS ARMED TR SERIES 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER - BURNT BRONZE 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...Sale: $229.00MSRP: $319.00 -
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 18" .308 Winchester Billet Upper - Tungsten Gray
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - Tungsten Gray Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel - Black Nitride Finish Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread...Sale: $409.00MSRP: $539.00