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
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Pistol Upper Receiver - Flat Dark Earth Chambered in .300 Blackout 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride 7075-T6 Milspec Upper Receiver Pistol Length Gas System .750 Low Profile Gas Block Dimpled...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Vital 7.5" 5.56 Pistol Kit
Sale: $419.00MSRP: $479.00Ghost Firearms Vital 7.5" Upper Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider 7.5" 1:7 Twist 4150 M4 Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand Guard Ghost...Sale: $419.00MSRP: $479.00 -
On Sale
ALWAYS ARMED 10.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE
Sale: $209.00MSRP: $299.00Always Armed 10.5" 300 Blackout Upper Receiver - Magpul FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...Sale: $209.00MSRP: $299.00 -
On Sale
Ghost Firearms Elite 16" Upper 9MM - BLACK
Sale: $249.00MSRP: $319.00GHOST FIREARMS ELITE 16" UPPER - 9MM UPPER RECEIVER- BLACK Hard Coat Black Anodized Chambered in 9x19 Para A2 Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride 1/2x36 Thread Pattern Ghost Firearms 14" M-Lok Free Float...Sale: $249.00MSRP: $319.00 -
Out of stock
ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER - BLACK ANODIZED
$269.00ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 5.5" Free Float M-LOK Rail Flash Can Muzzle Device Hard Coat Black Anodized Finish$269.00 -
On Sale
Ghost Elite 10.5" Upper 5.56 Nato Blue Titanium
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 10.5" 5.56 Upper - Blue Titanium Made in the USA Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 10.5" 1:7 4150 M4 Barrel Black Nitride Mil-spec Upper Receiver with Carbine Length Gas System Ghost...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Vital 10.5" 5.56 Pistol Kit
Sale: $419.00MSRP: $479.00Ghost Firearms Vital 10.5" 5.56 Upper - 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 Hand...Sale: $419.00MSRP: $479.00 -
On Sale
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" 5.56 FLASH CAN UPPER RECEIVER - OD GREEN Finished in OD 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 .750 Low...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Fireams Elite 10.5" Upper .300 Blackout - OD Green
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 10.5".300 - OD Green OD Green Cerakote Finished Chambered in .300 Blackout (7.62x35) A2 Flash Hider 10.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 9"...Sale: $259.00MSRP: $329.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO Upper Receiver with 15" M-LOK Quad Rail
Sale: $209.00MSRP: $329.00ALWAYS ARMED 16" 5.56 NATO Upper Receiver with 15" M-LOK Quad Rail Made in the USA 16" 4150 Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Quad Rail Black Anodized Finish Carbine Length Gas System A2 Muzzle Device 1:7 Twist Rate BCG and...Sale: $209.00MSRP: $329.00 -
On Sale
Ghost Firearms Elite 7.5" Upper 5.56 Nato - Burnt Bronze
Sale: $259.00MSRP: $329.00Ghost Firearms 7.5" 5.56 Upper - Burnt Bronze Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 7.5" 1:7 Twist 4150 M4 Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand Guard...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Elite 7.5" Upper 5.56 Nato Blue Titanium
Sale: $259.00MSRP: $329.00Ghost Firearms 7.5"5.56 Upper - Blue Titanium Blue Titanium Cerakote Finished Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 7.5" 1:7 Twist 4150 M4 Barrel Black Nitride Pistol Length Gas System Ghost Firearms...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Firearms 5.5" 9mm 1:10 HBAR Elite Barreled Upper - 7" M-LOK Rail - Flash Can - Tungsten Gray
Sale: $279.00MSRP: $329.00Ghost Firearms 5.5" Flash Can Upper with 7" Rail - Tungsten Gray Barrel - Length 5.5"/Black Nitride Finish Barrel Material 4150 Chrome Moly Steel 9mm Luger Gas System Type Blowback Flash Can Twist Rate1:10 7" M-LOK Free Float Rail...Sale: $279.00MSRP: $329.00 -
On Sale
Grid Defense 7.5" 9mm Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 7.5" 9mm Flash Can Upper Receiver - Flat Dark Earth Finished in Magpul FDE Cerakote Grid Defense 7.5" Upper Receiver Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 9" Grid Defense Octagon M-Lok Rail...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 10.5" 5.56 Flash Can Upper Receiver Finished in Burnt Bronze 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 .750...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Elite 7.5" Upper 5.56 Nato - Tungsten Gray
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5" Upper - Tungsten Grey Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 7.5" 1:7 Twist 4150 M4 Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand Guard Ghost...Sale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver Finished in Burnt Bronze Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) Pistol Length...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Firearms Elite 16" Upper .300 AAC Blackout - Burnt Bronze
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16".300 AAC Upper - Burnt Bronze 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 14" M-Lok Free Float...Sale: $269.00MSRP: $349.00 -
On Sale
Ghost Firearms Elite 7.5" Upper .300 Blackout Blue Titanium
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5" .300 - Blue Titanium Chambered in .300 Blackout (7.62x35) 7.5" Upper A2 Flash Hider 7.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float...Sale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense OD Green 7.5" 5.56 Flash Can Upper Finished in Magpul Olive Drab Green Cerakote 7075-T6 Mil Spec 5.56 Upper Receiver Chambered in 5.56x45 NATO 1:7 Twist 7.5" 4150 M4 Barrel - Black Nitride 9" Grid Defense Octagon M Lok Rail Dimpled...Sale: $329.00MSRP: $399.00