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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Out of stockOn Sale
Ghost IHS 5" 5.56 NATO Upper Receiver - Gold
Sale: $269.00MSRP: $339.00Ghost IHS 5" 5.56 Upper - Gold Cerakote FX Gold Upper Receiver Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 5" 1:5 Twist 4150 Chrome Moly Vanadium Barrel 1/2x28 Thread Pitch Micro Length Gas System Ghost 4.25" Integral...Sale: $269.00MSRP: $339.00 -
Ghost Vital 10.5" Upper 5.56 Nato With Stainless Steel Barrel with BCG & Charging Handle
$399.00GHOST FIREARMS VITAL 10.5" 5.56 UPPER RECEIVER - BLACK Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider (Black) 10.5" 1:7 Twist 416R M4 Stainless Steel Barrel Carbine Length Gas System Ghost Firearms 9"...$399.00 -
On Sale
Ghost Vital 16" Upper 5.56 NATO With 11" Rail - Black
Sale: $239.00MSRP: $299.00Ghost Vital 16" 5.56 NATO With 11" Rail - Black Chambered in 5.56 NATO 16" 1:7 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper Receiver Mil-Spec...Sale: $239.00MSRP: $299.00 -
Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - FDE
$414.00Grid Defense 16" 5.56 American Flag Dust Cover Upper Receiver - Flat Dark Earth Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas...$414.00 -
Grid Defense 16" 5.56 Quad Rail Upper Receiver - Tactical Grape
$399.00Grid Defense 16" 5.56 Quad Rail Upper Receiver - Tactical Grape Tactical Grape Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper Receiver$399.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Tactical Grape
Sale: $329.00MSRP: $399.00Grid Defense 16" Upper Receiver Purple Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper ReceiverSale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 9mm Stainless Steel Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Stainless Steel Upper Receiver - FDE Finished in Flat Dark Earth Cerakote Milspec 7075-T6 Upper Receiver 16" 416R Stainless Steel Barrel with 1:10 Twist Rate 1/2x36 Thread Pattern 14" Grid Defense Octagon M-Lok Rail A2 Muzzle Device...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 9mm Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Upper Receiver - OD Green Finished in Magpul Olive Drab Green Cerakote Milspec 7075-T6 Upper Receiver 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 14" Grid Defense Octagon M-Lok Rail A2 Muzzle...Sale: $329.00MSRP: $399.00 -
Grid Defense 18" 5.56 NATO Rifle Length Upper Receiver
$349.00Grid Defense 18" 5.56 NATO Rifle Length Upper Receiver Chambered in 5.56 NATO 14" Free Float M-Lok Rail 18" 1:7 Twist Government Profile 4150 Barrel - Black Nitride Rifle Length Gas System 1/2x28 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6...$349.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - FDE
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch Grid Defense 14" M-Lok Free Float...Sale: $349.00MSRP: $419.00 -
On Sale
Grid Defense 7.5" 5.56 NATO Upper Receiver - Black
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 NATO Upper Receiver Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Hard Coat Black Anodized Finish Pistol Length Gas System A2 Flash Hider Chambered...Sale: $299.00MSRP: $379.00 -
On Sale
GRID DEFENSE 7.5" 9MM STAINLESS STEEL FLASH CAN UPPER RECEIVER - BLACK ANODIZED
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" 9MM STAINLESS STEEL FLASH CAN UPPER RECEIVER - BLACK ANODIZED Hard Coat Black Anodized Finish Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 416R Stainless Steel Barrel 9" Grid Defense Octagon M-Lok Rail Dimpled Flash...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 7.5" 9mm Upper Receiver - Pink Champagne
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 9MM Upper Receiver - Pink Champagne Finished in Pink Champagne Cerakote AR15 Skeletonized Upper Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 M4 Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver High quality AR15 upper receivers Tungsten Gray Cerakote Finish Stainless Steel AR 15 Upper Receiver Chambered in 5.56 NATO Grid Defense Mil Spec 7075 T6 Upper Receiver Grid Defense 9" M-Lok...Sale: $299.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Burnt Bronze Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 7.5" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System Grid...Sale: $299.00MSRP: $399.00 -
Out of stockOn Sale
Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Zombie Green
Sale: $399.00MSRP: $499.00Always Armed 4.5" 9MM Gen2 Flash Can Pistol Kit - Zombie Green Zombie Green Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 4.5" 1:10 Twist 4150 Chrome Moly Steel...Sale: $399.00MSRP: $499.00 -
On Sale
ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER - FDE
Sale: $239.00MSRP: $299.00ALWAYS ARMED 4.5" 9MM OCTO GEN 2 FLASH CAN UPPER RECEIVER Made in the USA Mil Spec AR15 Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4.25" Free Float M-LOK Rail Flash Can Muzzle Device Magpul FDE Cerakote FinishSale: $239.00MSRP: $299.00 -
On Sale
ALWAYS ARMED BX SERIES 16" 5.56 NATO RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $469.00Always Armed BX Series 16" 5.56 NATO 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 NATO Carbine Length Gas System...Sale: $349.00MSRP: $469.00 -
Out of stockOn Sale
ALWAYS ARMED OCTO SEREIS 7.5" 300 BLACKOUT UPPER RECEIVER WITH AXE BRAKE - TITANIUM
Sale: $249.00MSRP: $329.00ALWAYS ARMED OCTO SEREIS 7.5" 300 BLACKOUT UPPER RECEIVER WITH AXE BRAKE - TITANIUM 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...Sale: $249.00MSRP: $329.00 -
Out of stockOn Sale
ALWAYS ARMED ULTRALIGHT SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $219.00MSRP: $319.00ALWAYS ARMED ULTRALIGHT SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" Pencil Profile 4150 Steel Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid...Sale: $219.00MSRP: $319.00