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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Ghost IHS 5" 5.56 Pistol Kit
$419.00 - $439.00Ghost IHS 5" 5.56 Pistol Kit Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider 5" 1:5 Twist 4150 M4 Barrel Black Nitride Micro Length Gas System Ghost Firearms 4.25" IHS M-Lok Free Float Hand Guard Ghost...$419.00 - $439.00 -
On Sale
ALWAYS ARMED 10.5" 7.62X39 UPPER RECEIVER - SMITH & WESSON RED
Sale: $209.00MSRP: $299.00Always Armed 10.5" 7.62X39 Upper Receiver - Smith & Wesson Red Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7.62X39 Carbine Length Gas...Sale: $209.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED Made in the USA Mil Spec AR15 9mm Flash Can Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4" TR Series Free Float M-LOK Rail Flash...Sale: $189.00MSRP: $269.00 -
On Sale
ALWAYS ARMED JESTER 16" 5.56 NATO UPPER RECEIVER - BURNT BRONZE
Sale: $219.00MSRP: $319.00ALWAYS ARMED JESTER 16" 5.56 NATO UPPER RECEIVER 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 Low...Sale: $219.00MSRP: $319.00 -
On Sale
Ghost Elite 16" Upper .300 Blackout Don't Tread On Me Dust Cover Charging Handle Combo - FDE
Sale: $319.00MSRP: $369.00Ghost Firearms Elite 16" Upper .300 Blackout - FDE Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 14" M-Lok Free...Sale: $319.00MSRP: $369.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout Pistol Kit - Tungsten Gray
Sale: $395.00MSRP: $579.00Ghost Firearms 7.5" .300 Pistol Kit - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in .300 Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 5/8 by 24 7.5" 1:8 Twist 4150 Chrome Moly Steel...Sale: $395.00MSRP: $579.00 -
On Sale
Ghost Firearms 7.5" 5.56mm with 7" M-Lok Pistol Kit OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 7.5" Pistol Kit - OD Green OD Green Cerakote Finished Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-Spec Charging Handle A2 Flash Hider 7.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $439.00MSRP: $579.00 -
GRID DEFENSE 10.5" 5.56 STAINLESS STEEL FLASH CAN UPPER RECEIVER WITH RADIAN RAPTOR CHARGING HANDLE & NIB BOLT CARRIER GROUP
$599.00Grid Defense 10.5" 5.56 Stainless Steel Flash Can Upper Receiver With Radian Raptor Charging Handle & NIB Bolt Carrier Group Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4...$599.00 -
Out of stockOn Sale
Grid Defense 18" 6mm ARC Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote Chambered in 6mm ARC 14" Free Float M-Lok Rail 18" 4150 Heavy Profile Barrel - Black Nitride 1:8 Twist Rate .750 Mid Length Gas System 5/8x24 Thread...Sale: $329.00MSRP: $419.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Zombie Green
Sale: $329.00MSRP: $399.00GRID DEFENSE 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER - ZOMBIE GREEN Finished in Zombie Green Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 7.5" 1:8 Twist 4150 Barrel - Black Nitride Chambered in .300 Blackout Pistol Length Gas System .750...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" .308 WIN BILLET UPPER RECEIVER - BLACK
Sale: $299.00MSRP: $429.00ALWAYS ARMED 16" .308 WIN BILLET UPPER RECEIVER - BLACK Billet DPMS Pattern High Profile 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...Sale: $299.00MSRP: $429.00 -
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 -
On Sale
ALWAYS ARMED OCTO SERIES 10.5" 5.56 NATO UPPER RECEIVER - BURNT BRONZE
Sale: $209.00MSRP: $299.00ALWAYS ARMED OCTO SERIES 10.5" 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 9.25" Free Float M-LOK OCTO Series Rail 10.5" 1:7 Twist Barrel...Sale: $209.00MSRP: $299.00 -
On Sale
Ghost Firearms 10.5" 5.56 Flash Can Upper Receiver Pistol Kit - Tungsten Gray
Sale: $449.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Tungsten Gray Cerakote Milspec 7075-T6 Upper Receiver 10.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Carbine Length Gas System...Sale: $449.00MSRP: $599.00 -
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 18" 350 Legend Upper Receiver - FDE
Sale: $349.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in 350 Legend A2 Flash Hider 18" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch Grid Defense 14" M-Lok Free Float Hand Guard...Sale: $349.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Tactical Grape
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Pistol Upper Receiver - Tactical Grape Made in the USA Chambered in .300 Blackout (7.62x35) 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System .750 Low Profile Gas Block Dimpled Flash...Sale: $329.00MSRP: $399.00 -
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
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Carbine Length Gas System Grid Defense...Sale: $329.00MSRP: $429.00 -
On Sale
10.5" 5.56mm with 9" M-Lok Pistol Kit OD Green
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" 5.56 Pistol Kit - OD Green OD Green Cerakote Finish Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black Nitride...Sale: $439.00MSRP: $579.00