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 stock
Always Armed Smith & Wesson Red Limited Edition 10.5" 5.56 NATO Upper Receiver with Blue Strike Industries Accessories
$541.84Always Armed Smith & Wesson Red Limited Edition 10.5" 5.56 NATO 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 NATO...$541.84 -
Out of stockOn Sale
ALWAYS ARMED ULTRALIGHT 16" 5.56 NATO RIFLE KIT - BLACK ANODIZED
Sale: $409.00MSRP: $609.00Always Armed 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" Pencil 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid Length Gas System .750...Sale: $409.00MSRP: $609.00 -
On Sale
Ghost 16" .308 Winchester Billet Rifle Kit - OD Green
Sale: $599.00MSRP: $729.00Ghost 16" .308 Winchester Billet Rifle Kit - OD Green Billet DPMS Pattern High Profile Upper 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15"...Sale: $599.00MSRP: $729.00 -
On Sale
Ghost 16" .308 Winchester Billet Rifle Kit - Tungsten Gray
Sale: $599.00MSRP: $729.00Ghost 16" .308 Winchester Billet Rifle Kit - Tungsten Gray Billet DPMS Pattern High Profile Upper 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash...Sale: $599.00MSRP: $729.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - BLACK
Sale: $429.00MSRP: $499.00GHOST 16" .450 BUSHMASTER RIFLE KIT - BLACK Hard Coat Black Anodized Finish Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $429.00MSRP: $499.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - BURNT BRONZE
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - BURNT BRONZE Finished in Burnt Bronze Cerakote Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle Device Mil-Spec...Sale: $449.00MSRP: $519.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - FDE
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - FDE Finished in Flat Dark Earth Cerakote Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle Device Mil-Spec 7075-T6...Sale: $449.00MSRP: $519.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - TUNGSTEN GRAY
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - TUNGSTEN GRAY Finished in Tungsten Gray Cerakote Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" .308 Winchester Billet Rifle Kit - Burnt Bronze
Sale: $609.00MSRP: $739.00Ghost 18" .308 Winchester Billet Rifle Kit - Burnt Bronze Billet DPMS Pattern High Profile Upper 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK Free...Sale: $609.00MSRP: $739.00 -
On Sale
Ghost 18" 6mm ARC Rifle Kit - Burnt Bronze
Sale: $449.00MSRP: $519.00Ghost 18" 6mm ARC Rifle Kit - Burnt Brozne Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 6mm ARC Mid Length Gas System .750 Low Profile...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" 6mm ARC Rifle Kit - OD Green
Sale: $449.00MSRP: $519.00Ghost 18" 6mm ARC Rifle Kit - OD Green Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 6mm ARC Mid Length Gas System .750 Low Profile Gas...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 20" .308 Winchester Billet Rifle Kit - Blue Titanium
Sale: $619.00MSRP: $749.00Ghost 20" .308 Winchester Billet Rifle Kit - Blue Titanium Billet DPMS Pattern High Profile Upper 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK...Sale: $619.00MSRP: $749.00 -
Out of stockOn Sale
Ghost 20" 6.5 Grendel Rifle Kit - Black
Sale: $439.00MSRP: $509.00Ghost 20" 6.5 Grendel Rifle Kit - Black Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free Float Handguard Barrel Specifications 20" Heavy Profile...Sale: $439.00MSRP: $509.00 -
Out of stockOn Sale
Ghost 20" 6.5 Grendel Rifle Kit - Blue Titanium
Sale: $459.00MSRP: $529.00Ghost 20" 6.5 Grendel Rifle Kit - Blue Titanium Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free Float Handguard Barrel Specifications 20" Heavy Profile...Sale: $459.00MSRP: $529.00 -
Out of stockOn Sale
Ghost 20" 6.5 Grendel Rifle Kit - FDE
Sale: $459.00MSRP: $529.00Ghost 20" 6.5 Grendel Rifle Kit - FDE Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free Float Handguard Barrel Specifications 20" Heavy Profile...Sale: $459.00MSRP: $529.00 -
On Sale
Ghost 9" .22LR Pistol Kit - Tungsten Gray
Sale: $480.00MSRP: $599.00Ghost 9" .22LR Pistol Kit - Tungsten Gray Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9" 4150 Black Nitride Barrel Lightweight Pencil Profile Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered...Sale: $480.00MSRP: $599.00 -
On Sale
Ghost Elite 16" 5.56 NATO Join or Die Upper Receiver - Black
Sale: $259.00MSRP: $354.00Ghost Elite 16" 5.56 NATO Join or Die Upper Receiver - Black Mil-Spec 7075 Forged Aluminum Upper Receiver 14" Ghost Firearms M-Lok Rail Black Anodized Finish 16" 1:7 Twist 4150 M4 Barrel - Black Nitride A2 Birdcage Muzzle Device Carbine Length Gas...Sale: $259.00MSRP: $354.00 -
Ghost Firearms 7.5" .300 Blackout FDE Upper Receiver with Burnt Bronze Flash Can
$399.00Ghost Firearms 7.5" FDE UPPER RECEIVER WITH BURNT BRONZE FLASH CAN Finished in Flat Dark Earth Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:8 4150 M4 Barrel - Black Nitride Chambered in .300 Blackout .750 Low Profile Gas Block Pistol Length Gas System...$399.00 -
GHOST FIREARMS 7.5" 5.56 FLASH CAN UPPER RECEIVER WITH BURNT BRONZE 9" RAIL
$349.00GHOST FIREARMS 7.5" 5.56 FLASH CAN UPPER RECEIVER Proudly Made in the USA 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver - Black Anodized 7.5" 1:7 Twist 4150 Steel Barrel Pistol Length Gas System .750 Low Profile Gas Block Hard Coat Black Anodized...$349.00 -
Out of stock
Ghost Firearms Limited Edition 7.5" 5.56 Flash Can Upper with Strike Industries Dust Cover and Timber Creek Forward Assist - Black/FDE
$416.94Ghost Firearms 7.5" Flash Can Upper Receiver Hard Coat Black Anodized Finish Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas System Ghost Firearms 9" M-Lok...$416.94