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
ALWAYS ARMED 7.5" 5.56 NATO TR SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $249.00ALWAYS ARMED 7.5" 5.56 NATO TR 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 -
On Sale
Ghost Vital 7.5" .300 Blackout Pistol Kit
Sale: $419.00MSRP: $479.00Ghost Firearms Vital 7.5" .300 Upper A2 Birdcage Flash Hider 7.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand Guard 5/8 by 24 Thread Ghost Mil-Spec 7075 T6 Upper...Sale: $419.00MSRP: $479.00 -
On Sale
Ghost Firearms Elite 7.5" Upper .300 Blackout Tungsten Gray
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5" .300 - Tungsten Gray Tungsten Gray Cerakote Finished Chambered in .300 Blackout (7.62x35) A2 Flash Hider 7.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost...Sale: $259.00MSRP: $329.00 -
On Sale
Ghost Vital 10.5" .300 Blackout Pistol Kit
Sale: $419.00MSRP: $479.00Ghost Firearms Vital 10.5" .300 Blackout Pistol Kit Chambered in .300 Blackout (7.62x35) A2 Birdcage Flash Hider 10.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 9" M-Lok Free Float Hand Guard...Sale: $419.00MSRP: $479.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" STAINLESS STEEL 9MM TR SERIES UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $299.00ALWAYS ARMED 7.5" STAINLESS STEEL 9MM TR SERIES UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver 7" TR Series MLOK Hand Guard 7.5" 1:10 Twist 416R Stainless Steel Barrel Chambered 9X19 Para A2 Flash Hider Hard Coat Black Anodized...Sale: $179.00MSRP: $299.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Upper Receiver - Tungsten Gray Tungsten Gray 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 -
10.5" 5.56 Nato Upper Receiver with 10" MLOK Hand Guard
$289.0010.5" 5.56 Nato Upper Receiver with 10" MLOK Hand Guard Made in the USA 10.5" 4150 Barrel Chambered in 5.56 NATO 10" Free Floating MLOK Hand Guard Black Anodized Finish Carbine Length Gas System A2 Muzzle Device BCG and Charging Handle are NOT...$289.00 -
On Sale
ALWAYS ARMED 10.5" 5.56 NATO BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $279.00ALWAYS ARMED 10.5" 5.56 NATO BX SERIES 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 .750...Sale: $189.00MSRP: $279.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 9.25" MLOK RAIL - BLACK
Sale: $229.00MSRP: $299.00ALWAYS ARMED 7.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 9.25" MLOK RAIL - BLACK Hard Coat Black Anodized Finish Mil-Spec AR15 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK Rail 7.5" 1:7 Twist 4150 Barrel with Black Nitride...Sale: $229.00MSRP: $299.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver Finished in Tungsten Gray Cerakote Mil-spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride 9" Octagon M-Lok Rail Pistol Length Gas System Dimple Flash Can...Sale: $329.00MSRP: $399.00 -
Out of stock
Always Armed 10.5" .300 Blackout Upper Receiver with Stainless Steel Barrel and 7" M-Lok Hand Guard
$289.00Always Armed 10.5" .300 Blackout Upper Receiver with Stainless Steel Barrel and 7" M-Lok Hand Guard Hard Coat Black Anodized Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 10.5" 1:8 Twist 416R Stainless Steel Light HBar Barrel ...$289.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol...Sale: $189.00MSRP: $269.00 -
On Sale
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 7.5" 5.56 Flash Can Upper - Tungsten Gray Finished in Tungsten Gray Cerakote 7075-T6 MilSpec Upper Receiver 7.5" 1:7 Twist 4150 Barrel - Black Nitride Chambered in 5.56x45 NATO Dimpled Flash Can 9" M-lok Octagon Rail Pistol Length Gas...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Firearms Elite 16" Upper 9MM -Tungsten Gray
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" Upper 9MM - Tungsten Gray Chambered in 9x19 Para 1/2x36 Thread Pattern A2 Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 14" M-Lok Free Float Hand Guard Ghost...Sale: $269.00MSRP: $349.00 -
16" 5.56 Nato Upper Receiver with 15" MLOK Hand Guard
$289.0016" 5.56 Nato Upper Receiver with 15" MLOK Hand Guard Made in the USA 16" 4150 Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Hand Guard Black Anodized Finish Carbine Length Gas System A2 Muzzle Device 1:7 Twist Rate BCG and Charging Handle...$289.00 -
Out of stock
Always Armed 16" .300 Blackout Upper Receiver with Stainless Steel Barrel, AXE Brake and 12" M-Lok Rail - Black Anodized
$349.00Always Armed 16" .300 Blackout Upper Receiver Black Anodized Finish Chambered in .300 Blackout 12" Aluminum M-LOK Hand Guard 16" 1:8 416R Stainless Steel Barrel Pistol Length Gas System Stainless Steel AXE Brake Mil-Spec 7075-T6 Upper Receiver$349.00 -
On Sale
GRID DEFENSE 10.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - TUNGSTEN GRAY
Sale: $329.00MSRP: $399.00GRID DEFENSE 10.5" .300 BLACKOUT DIMPLED FLASH CAN UPPER TUNGSTEN GRAY Finished in Tungsten Gray Cerakote 300 Blackout Flash Can Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL - BLACK
Sale: $199.00MSRP: $269.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL - 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 Finish 1/2x36 A2 Muzzle...Sale: $199.00MSRP: $269.00 -
On Sale
ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED OCT2 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" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length Gas System ...Sale: $199.00MSRP: $299.00 -
Ghost 16" 5.56 Front Sight Upper
$179.00 - $219.00Ghost 16" 5.56 NATO Front Sight Upper Receiver Made in the USA Mil-Spec 7075 T6 5.56 Nato Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length...$179.00 - $219.00