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 10.5" 5.56 Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" 5.56 FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie 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 ...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 7.5" STAINLESS STEEL 9MM QUAD RAIL COMPLETE UPPER RECEIVER WITH BCG/CH - BLACK
Sale: $220.00MSRP: $457.00ALWAYS ARMED 7.5" STAINLESS STEEL 9MM QUAD RAIL UPPER RECEIVER WITH BCG/CH - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver 7" Quad Rail MLOK Hand Guard 7.5" 1:10 Twist 416R Stainless Steel Barrel Chambered 9X19 Para A2 Flash Hider 1/2x36...Sale: $220.00MSRP: $457.00 -
On Sale
Ghost 16" .22LR Rifle Kit - Black
Sale: $479.00MSRP: $599.00Ghost 16" .22LR Rifle Kit - Black Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 4150 Black Nitride Barrel Lightweight Pencil Profile Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered in .22 Long...Sale: $479.00MSRP: $599.00 -
On Sale
ALWAYS ARMED 16" STAINLESS STEEL 9MM RIFLE KIT - BLACK
Sale: $349.00MSRP: $519.00Always Armed 16" Stainless Steel 9mm Rifle Kit - Black Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 16" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para 1/2x36 A2 Flash Hider - Black 15" Free Float M-LOK Hand Guard...Sale: $349.00MSRP: $519.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - ZOMBIE GREEN
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - ZOMBIE GREEN Made in the USA Zombie Green Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 15" Free Float M-LOK OCTO Series Rail 16" 1:7 Twist Barrel with...Sale: $219.00MSRP: $319.00 -
GRID DEFENSE 10.5" 5.56 STAINLESS STEEL FLASH CAN UPPER RECEIVER WITH RADIAN RAPTOR CHARGING HANDLE & NIB BOLT CARRIER GROUP
$599.00Grid Defense 10.5" 5.56 Stainless Steel Flash Can Upper Receiver With Radian Raptor Charging Handle & NIB Bolt Carrier Group Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4...$599.00 -
On Sale
Grid Defense 16" .22LR Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense 16" .22LR Upper Receiver - Black Milspec 7075-T6 Upper Receiver 16" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 14" Grid Defense Octagon M-Lok Rail Hard Coat Black Anodize A2 Muzzle...Sale: $329.00MSRP: $399.00 -
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
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 7.5" 1:8 Twist 4150 Barrel - Black Nitride Chambered in .300 Blackout Pistol Length Gas System .750...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Black Hard Coat Black Anodized Finish Chambered in .223 Wylde 16" 416R Stainless Steel Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Carbine Length Gas...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL ULTRALIGHT UPPER RECEIVER WITH 13.5" RAIL - BLACK
Sale: $199.00MSRP: $269.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 13.5" RAIL - BLACK Chambered in 9x19 Para Made in the USA 16" 416R Stainless Steel Barrel 1:10 Twist Rate 13.5" Ultralight Free Floating MLOK Rail Hard Coat Black Anodized Finish...Sale: $199.00MSRP: $269.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, BI-POD, AND SIGHTS - BLACK
Sale: $219.00MSRP: $369.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, BI-POD, AND SIGHTS - BLACK Chambered in 9x19 Para Made in the USA 16" 416R Stainless Steel Barrel 1:10 Twist Rate 12" Free Floating MLOK Rail Hard Coat Black Anodized...Sale: $219.00MSRP: $369.00 -
Out of stock
ALWAYS ARMED 20" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL
$299.00ALWAYS ARMED 20" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL Made in the USA 7075-T6 Mil-Spec Upper Receiver 20" 4150 Steel Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Quad Rail Black Anodized Finish Rifle Length Gas System A2...$299.00 -
Out of stock
ALWAYS ARMED COMPLETE 7.5" 5.56 NATO UPPER RECEIVER WITH 7" KEYMOD RAIL, BCG, CHARGING HANDLE & SIGHTS
$399.00ALWAYS ARMED COMPLETE 7.5" 5.56 NATO 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...$399.00 -
On Sale
Ghost Firearms 7.5" 9mm Stainless Steel Flash Can Upper Receiver - Black
Sale: $249.00MSRP: $349.00Ghost Firearms 7.5" 9mm Stainless Steel Flash Can Upper Receiver - Black Proudly Made in the USA Chambered in 9mm 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver 7.5" 1:10 Twist 416R Stainless Steel Barrel 1/2x36 Thread Pattern Flash Can...Sale: $249.00MSRP: $349.00 -
On Sale
Ghost Vital 16" Upper 7.62x39
Sale: $249.00MSRP: $299.00Ghost Firearms Vital 16" Upper Chambered in 7.62x39 A2 Birdcage Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost...Sale: $249.00MSRP: $299.00 -
ALWAYS ARMED 10.5" .300 BLACKOUT TR SERIES WITH TRINITY FORCE SIGHTS PISTOL KIT - BLACK ANODIZED
$489.00Always Armed 10.5" .300 Blackout TRX Series with Trinity Force Sights Pistol Kit - Black Anodized 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...$489.00 -
ALWAYS ARMED 10.5" 5.56 NATO UPPER RECEIVER WITH 12" MLOK RAIL & TEQUILA SUNRISE FLASH CAN - BLACK
$299.00ALWAYS ARMED 10.5" 5.56 NATO FLAHS CAN UPPER RECEIVER 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 Length Gas System ...$299.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK
Sale: $209.00MSRP: $299.00ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK Made in the USA 16" 416R Stainless Steel Barrel Chambered in 9X19 Para 15" BX Series Free Floating MLOK Rail Black Anodized Finish 16 Inch 9mm Upper Receiver A2 Muzzle Device -...Sale: $209.00MSRP: $299.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - Black
Sale: $349.00MSRP: $419.00Grid Defense 20" .350 Legend Upper Receiver - Black Hard Coat Black Anodized Chambered in .350 Legend 14" Free Float M-Lok Rail 20" 1:16 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6...Sale: $349.00MSRP: $419.00