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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Ghost Firearms 16" A2 Front Sight Upper with Rear Sight
$349.00Ghost Firearms 5.56 Complete Upper Receiver with A2 Front Sight 16” 1:7 Twist Chrome Moly Barrel, M4 Profile Chambered in .223/5.56 Direct Gas Impingement Gas System A-2 Flash Hider A-2 Handguard A2 Front Sight Gas Block Rear Flip Sight...$349.00 -
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
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL - BURNT BRONZE
Sale: $219.00MSRP: $299.00ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL - BURNT BRONZE Made in the USA 16" 4150 Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Quad Rail Burnt Bronze Cerakote Finish Carbine Length Gas System A2 Muzzle Device 1:7...Sale: $219.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - RIDGEWAY BLUE
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout Upper Receiver - Ridgeway Blue 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...Sale: $209.00MSRP: $299.00 -
Out of stockOn 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 Vital 7.5" Upper 5.56 Nato With Stainless Steel Barrel with BCG and Charging Handle
Sale: $259.00MSRP: $399.00Ghost Firearms Vital 7.5" Upper Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider (Black) 7.5" 1:7 Twist 416R M4 Stainless Steel Barrel Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand...Sale: $259.00MSRP: $399.00 -
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 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
ALWAYS ARMED 16" 300 BLACKOUT RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $469.00Always Armed 16" 300 Blackout Rifle Kit - Black Anodized Made in the USA Mil-Spec Lower Parts Kit Carbine Buffer Tube Assembly Rifle Butt Stock Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black...Sale: $349.00MSRP: $469.00 -
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 -
Out of stockOn Sale
ALWAYS ARMED 20" .308 WIN UPPER RECEIVER WITH 15" M-LOK - BLACK ANODIZED
Sale: $329.00MSRP: $459.00ALWAYS ARMED 20" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider 15" M-LOK Free Floating Rail Black...Sale: $329.00MSRP: $459.00 -
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 -
Out of stockOn 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 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 - FDE
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Magpul Flat Dark Earth 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...Sale: $459.00MSRP: $729.00 -
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
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" 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 -
On Sale
ALWAYS ARMED 16" 7.62X39 UPPER RECEIVER - BLACK ANODIZED
Sale: $199.00MSRP: $299.00Always Armed 16" 7.62X39 Upper Receiver - Black Anodized 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