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" 5.56 Flash Can Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense AR-15 7.5" 5.56 Flash Can Upper Receiver - FDE Finished in Magpul Flat Dark Earth Cerakote 5.56 Upper Receiver 7075-T6 Mil-Spec Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO 9" Octagon M-Lok...Sale: $329.00MSRP: $399.00 -
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 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK Made in the USA Hard Coat Black Anodized 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 Black...Sale: $199.00MSRP: $299.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze Made in the USA Chambered in .300 Blackout (7.62x35) Dimpled Flash Can Pistol Length Gas System 9" Grid Defense Octagon M-Lok Rail 7.5" 1:8 Twist 4150 Light HBar Barrel -...Sale: $329.00MSRP: $399.00 -
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
Always Armed 16" .300 Blackout TR Series Upper Receiver - Black
Sale: $199.00MSRP: $299.00Always Armed 16" .300 Blackout TR Series Upper Receiver - Black Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 1:8 Twist 15" TR Series Free Floating M-LOK Hand Guard Black Anodized Finish Pistol Length Gas System .750 Low Profile Gas Block...Sale: $199.00MSRP: $299.00 -
On Sale
Ghost Firearms Elite 7.5" Upper .300 Blackout - OD Green
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5".300 Upper - OD Green OD Green 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 Firearms 7"...Sale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense OD Green .300 Blackout Flash Can Upper Receiver Made in the USA 9" Free Floating M-Lok Rail Finished in Magpul OD Green Cerakote Dimpled Flash Can - 5/8x24 Thread Pattern .750 Low Profile Gas Block Pistol Length Gas System 7075-T6...Sale: $329.00MSRP: $399.00 -
Out of stock
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 UPPER RECEIVER - SMITH & WESSON RED
Sale: $209.00MSRP: $299.00Always Armed 10.5" 5.56 NATO Upper Receiver - Smith & Wesson AR 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 in 5.56...Sale: $209.00MSRP: $299.00 -
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
Grid Defense 10.5" 5.56 Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Magpul Flat Dark Earth Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas...Sale: $299.00MSRP: $379.00 -
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 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout Upper Receiver - Smith & Wesson Red 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 Length...Sale: $209.00MSRP: $299.00 -
On 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 -
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 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
ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE
Sale: $219.00MSRP: $319.00Always Armed 16" 300 Blackout Upper Receiver - Burnt Bronze Made in the USA Mil-Spec 7075 T6 16" Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...Sale: $219.00MSRP: $319.00 -
On Sale
Ghost Firearms Elite 16" Upper 9MM - Blue Titanium
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" Upper 9MM - Blue Titanium Blue Titanium Finished Chambered in 9x19 Para A2 Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 14" M-Lok Free Float...Sale: $269.00MSRP: $349.00 -
Out of stock
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