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 TR SERIES 16" 5.56 NATO UPPER RECEIVER WITH 12" RAIL - BURNT BRONZE
Sale: $219.00MSRP: $319.00ALWAYS ARMED TR SERIES 16" 5.56 NATO UPPER RECEIVER WITH 12" RAIL - BURNT BRONZE Made in the USA Mil-Spec 7075 T6 Magpul Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Black Nitride Barrel Chambered in 5.56 NATO Carbine...Sale: $219.00MSRP: $319.00 -
GHOST FIREARMS 16" 5.56 WITH 14" M-LOK RAIL RIFLE KIT WITH MOE STOCK AND MOE+ GRIP- BLACK
$662.90GHOST FIREARMS 16" 5.56 RIFLE KIT Hard Coat Black Anodized Chambered in 5.56 NATO 16" 1:7 Twist 4150 M4 Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper Receiver Mil-Spec Lower Parts...$662.90 -
Out of stockOn Sale
Ghost Firearms 16" 9mm Rifle Kit - Tactical Grape
Sale: $399.00MSRP: $729.00Ghost Firearms 16" 9mm Rifle Kit Finished in Purple Cerakote Chambered in 9x19 Para 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 1/2x36 Thread Pattern 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper Receiver...Sale: $399.00MSRP: $729.00 -
On Sale
Ghost Vital 16" .300 Blackout With Black Upper and 14" FDE Rail
Sale: $254.00MSRP: $329.00Ghost Vital 16" Black Upper .300 Blackout With 14" FDE Rail - Black Chambered in .300 Blackout 16" 1:8 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 14" M-Lok Free Float Hand Guard Finished in Flat Dark...Sale: $254.00MSRP: $329.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - BURNT BRONZE
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - BURNT BRONZE 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...Sale: $219.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER WITH 12" M-LOK - BURNT BRONZE
Sale: $219.00MSRP: $319.00Always Armed 16" 5.56 NATO Upper Receiver - Burnt Bronze 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: $219.00MSRP: $319.00 -
Out of stockOn Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - PINK CHAMPAGNE
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - PINK CHAMPAGNE Made in the USA Pink Champagne 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 -
On Sale
Grid Defense 16" .22LR Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" .22LR Upper Receiver - FDE 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 Flat Dark Earth Cerakote...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" .22LR Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense 16" .22LR Upper Receiver - OD Green 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 OD Green Cerakote Finish A2...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 7.62x39 Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 16" 7.62x39 Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in 7.62x39 A2 Birdcage Muzzle Device Milspec 7075-T6 Upper Receiver 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 14" M-Lok Free Floating Rail...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 16" 7.62x39 Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 7.62x39 Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Chambered in 7.62x39 16" 4150 1:10 Twist Light HBar Barrel - Black Nitride Carbine Gas System A2 Birdcage Muzzle Device Mil-Spec 7075-T6 Upper Receiver 14"...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - SMITH & WESSON RED
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - SMITH & WESSON RED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300...Sale: $219.00MSRP: $319.00 -
Out of stockOn Sale
ALWAYS ARMED 16" .308 WIN UPPER RECEIVER WITH 15" M-LOK - FDE
Sale: $329.00MSRP: $459.00ALWAYS ARMED 16" .308 WIN UPPER RECEIVER DPMS Pattern Upper Receiver 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider 15" M-LOK Free Floating Rail Magpul FDE...Sale: $329.00MSRP: $459.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - SMITH & WESSON RED
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - SMITH & WESSON RED 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...Sale: $219.00MSRP: $319.00 -
Out of stockOn Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 15" KEYMOD HAND GUARD - BLACK
Sale: $209.00MSRP: $279.00Always Armed 16" 9MM Stainless Steel Upper Receiver With 15" Keymod Hand Guard Made in the USA Mil-Spec Upper Receiver with Dust Cover and Forward Assist 16" 416R Stainless Steel Barrel Chambered in 9x19 PARA 15" Free Floating Key Mod Hand Guard Black...Sale: $209.00MSRP: $279.00 -
Out of stockOn Sale
Ghost 16" .308 Winchester Billet Upper - Olive Drab Green
Sale: $399.00MSRP: $529.00Ghost 16" .308 Winchester Billet Upper - Olive Drab 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" M-LOK...Sale: $399.00MSRP: $529.00 -
Out of stockOn Sale
Ghost Firearms 16" 300 AAC Blackout with 14" M-LOK RAIL RIFLE KIT - TACTICAL GRAPE
Sale: $449.00MSRP: $599.00GHOST FIREARMS 16" 300 AAC BLACKOUT RIFLE KIT - Tactical Grape Finished in Purple Cerakote Chambered in 300 Blackout (7.62x35) 16" 1:8 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Pistol Length Gas...Sale: $449.00MSRP: $599.00 -
Out of stock
GHOST FIREARMS 16" 5.56 SS UPPER RECEIVER LIMITED EDITION WITH AMBI CHARGING HANDLE & AXE BRAKE - TITANIUM
$439.00GHOST FIREARMS 16" 5.56 SS UPPER RECEIVER LIMITED EDITION - TITANIUM Finished in Titanium Cerakote Milspec 7075-T6 Upper Receiver 16" 1:7 416R Stainless Steel Barrel Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System Ghost...$439.00 -
On Sale
Ghost Firearms 16" 7.62X39 WITH 14" M-LOK Rail Rifle Kit - OD GREEN
Sale: $519.00MSRP: $659.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Finished in Magpul OD Green Cerakote Chambered in 7.62x39 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail Carbine Length Gas System A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $519.00MSRP: $659.00 -
On Sale
Ghost Firearms 16" 7.62X39 WITH 14" M-LOK Rail Rifle Kit - TUNGSTEN GRAY
Sale: $519.00MSRP: $659.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Finished in Tungsten Gray Cerakote Chambered in 7.62x39 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail Carbine Length Gas System A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $519.00MSRP: $659.00