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
Ghost Vital 16" Upper .300 Blackout With 11" Rail - Black
Sale: $239.00MSRP: $299.00Ghost Vital 16" Upper .300 Blackout With 11" Rail - Black Chambered in .300 Blackout (7.62x35) 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec...Sale: $239.00MSRP: $299.00 -
On Sale
Ghost Firearms 16" 7.62x39 With 14" M-LOK Rail Rifle Kit - BLACK
Sale: $499.00MSRP: $559.00GHOST FIREARMS 16" 7.62x39 RIFLE KIT Hard Coat Black Anodized 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 Receiver...Sale: $499.00MSRP: $559.00 -
On Sale
Grid Defense 16" .22LR Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 16" .22LR Upper Receiver - Blue Titanium 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 Blue Titanium Cerakote...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - BURNT BRONZE
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - BURNT BRONZE Made in the USA Burnt Bronze 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
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $319.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY Made in the USA Tungsten Gray 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...Sale: $219.00MSRP: $319.00 -
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 -
Out of stockOn Sale
Ghost Firearms 16" .308 Winchester Billet Upper - Burnt Bronze
Sale: $399.00MSRP: $529.00Ghost Firearms 16" .308 Winchester Billet Upper - Burnt Bronze Billet DPMS Pattern High Profile Upper Receiver 16" 4150 Chrome Moly HBAR Contour Barrel, Mid Length Gas System Chambered in .308 Winchester with a 1:10 Twist Rate 5/8x24 with A2 Flash...Sale: $399.00MSRP: $529.00 -
On Sale
Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - FDE Flat Dark Earth Cerakote Finish Chambered in .223 Wylde 16" 416R Stainless Steel Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch Black A2 Muzzle Device Carbine Length Gas System Low...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER - TUNGSTEN GRAY 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 .750...Sale: $219.00MSRP: $319.00 -
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 -
On Sale
Grid Defense 16" 5.56 Mid Length Upper Receiver - FDE
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Mid Length Upper Receiver - FDE Magpul Flat Dark Earth Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Mid Length Gas System Magpul FDE Complete Upper A2 Flash Hider Mil-Spec...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO UPPER RECEIVER - SNIPER GRAY
Sale: $219.00MSRP: $319.00Always Armed 16" 5.56 NATO Upper Receiver - Sniper Gray 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 -
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 -
Out of stock
Ghost Firearms Elite Stainless Steel 16" Upper .300 Blackout - Flat Dark Earth
$379.00Ghost Firearms Elite Stainless Steel 16".300 AAC Blackout Upper - Flat Dark Earth FDE Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System Ghost...$379.00 -
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 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - MAGPUL FDE
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - MAGPUL FDE 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...Sale: $219.00MSRP: $319.00 -
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