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 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 Nitride Chambered in .300 Blackout (7.62x35) .750 Low...Sale: $449.00MSRP: $599.00 -
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 Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride...Sale: $449.00MSRP: $599.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TITANIUM
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TITANIUM 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...Sale: $219.00MSRP: $319.00 -
On Sale
Ghost 20" .308 Winchester Billet Upper - Flat Dark Earth
Sale: $419.00MSRP: $549.00Ghost AR10 20" 308 Upper Receiver - Flat Dark Earth Billet DPMS Pattern High Profile 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"...Sale: $419.00MSRP: $549.00 -
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" M-Lok Free Float Hand Guard Ghost Mil-Spec...Sale: $224.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 5.5" 9MM FLASH CAN UPPER RECEIVER WITH FDE FLASH CAN AND "WE THE PEOPLE" DUST COVER - OD GREEN
Sale: $209.00MSRP: $319.00ALWAYS ARMED 5.5" 9MM FLASH CAN UPPER RECEIVER - OD GREEN Finished in OD Green Cerakote Milspec 7075-T6 Upper Receiver 5.5" 1:10 9mm Barrel - Black Nitride Chambered in 9mm Always Armed 7" M-Lok Rail Magpul Flat Dark Earth Flash Can Laser...Sale: $209.00MSRP: $319.00 -
On Sale
BLEMISHED Ghost Vital 10.5" Upper 5.56 Nato - Black
Sale: $179.00MSRP: $259.00BLEMISHED Ghost Vital 10.5" Upper 5.56 Nato - Black Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider 10.5" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 9" M-Lok Free Float...Sale: $179.00MSRP: $259.00 -
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 Hider 10.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black Nitride...Sale: $439.00MSRP: $579.00 -
On 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 Gas System Ghost Firearms 7"...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Firearms 16" 300 AAC Blackout with 14" M-Lok Rifle Kit - Tungsten Gray
Sale: $449.00MSRP: $599.00Ghost Firearms 16".300 AAC Rifle Kit -Tungsten Gray Tungsten Gray Cerakote Finish Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 16" 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $449.00MSRP: $599.00 -
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 Nitride Chambered in .300 Blackout (7.62x35) A2 Muzzle...Sale: $299.00MSRP: $379.00 -
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 Octagon M-Lok Rail Chambered in 9x19 Para 5.5" 1:10 Twist...Sale: $329.00MSRP: $399.00 -
On Sale
GRID DEFENSE 7.5" 9MM UPPER RECEIVER - BLACK
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 9mm Upper Receiver Hard Coat Black Anodized Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail A2 Flash Hider - 1/2x36 Thread Pattern Chambered in 9x19...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO TR SERIES WITH TRINITY FORCE SIGHTS RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $519.00Always Armed 16" 5.56 NATO TRX With Trinity Force Sights 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...Sale: $349.00MSRP: $519.00 -
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 4150 Steel Barrel Chambered in 5.56...Sale: $249.00MSRP: $329.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO RIFLE KIT - BLACK
Sale: $349.00MSRP: $469.00ALWAYS ARMED OCTO 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 -
Out of stockOn Sale
Andro Corp 10.5" 5.56 Front Sight Upper Receiver - Black
Sale: $180.00MSRP: $429.00Andro Corp 10.5" 5.56 Front Sight Upper Receiver - Black Made in the USA 10.5" 5.56 NATO Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch 7075-T6 Mil-Spec Upper Receiver M4 Handguard Carbine Length Gas System A2 Muzzle Device Black Anodized Mil...Sale: $180.00MSRP: $429.00 -
On Sale
Ghost Firearms 7.5" 5.56 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" 1:7 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
Grid Defense 7.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Magpul OD Green 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 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $189.99MSRP: $299.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Chambered in 9x19 Para 16" 416R Stainless Steel Barrel 15" Free Floating MLOK Rail Hard Coat Black Anodized Finish A2 Muzzle Device - Black Nitride Finish 1:10...Sale: $189.99MSRP: $299.00