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 FIREARMS 16" 300 BLACKOUT WITH 14" M-LOK RAIL RIFLE KIT - BLACK
Sale: $429.00MSRP: $599.00GHOST FIREARMS 16" 300 AAC BLACKOUT RIFLE KIT Hard Coat Black Anodized 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 Mil-Spec 7075-T6 Upper...Sale: $429.00MSRP: $599.00 -
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND BI-POD - BLACK
$369.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND BI-POD - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56...$369.00 -
On Sale
Grid Defense 16" 5.56 Quad Rail Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Quad Rail Upper Receiver - Black Black Anodized Finish Chambered in 5.56x45 NATO 14" M-Lok Quad 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 16" 5.56 NATO BX SERIES UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - BLACK 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: $199.00MSRP: $299.00 -
Ghost Vital 16" Upper .300 Blackout with BCG/Charging Handle, AXE Brake and Sights
$449.00Ghost Firearms Vital 16" Upper Chambered in .300 Blackout (7.62x35) AXE Brake 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 7075...$449.00 -
On Sale
Ghost Firearms Elite 16" Upper 7.62X39 - BLACK ANODIZED
Sale: $249.00MSRP: $319.00GHOST FIREARMS ELITE 16" UPPER RECEIVER | BLACK ANODIZED 7.62X39 UPPER Chambered in 7.62x39 A2 Flash Hider 5/8x24 barrel thread pitch 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost...Sale: $249.00MSRP: $319.00 -
On Sale
ALWAYS ARMED 16" UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT
Sale: $315.00MSRP: $558.00Always Armed 16" 5.56 NATO Upper Receiver - Black 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: $315.00MSRP: $558.00 -
Out of stock
16" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard
$299.0016" .300 Blackout Upper Receiver with 15" KeyMod Hand Guard Made in the USA 16" 4150 Barrel Chambered in .300 Blackout 15" Free Floating Key Mod Hand Guard Black Anodized Finish Pistol Length Gas System A2 Muzzle Device$299.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO RIFLE KIT WITH BI-POD AND SIGHTS - BLACK ANODIZED
Sale: $349.00MSRP: $598.49ALWAYS ARMED 16" 5.56 NATO RIFLE KIT WITH BI-POD AND SIGHTS - BLACK ANODIZED 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...Sale: $349.00MSRP: $598.49 -
On Sale
ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED 16" .300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK 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 Blackout Pistol Length Gas...Sale: $199.00MSRP: $299.00 -
On Sale
GRID DEFENSE 16" .300 BLACKOUT UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Upper Receiver - Black Hard Coat Black Anodized Chambered in 300 Blackout (7.62x35) 14" M-Lok Rail 16" 1:8 4150 Light HBar Barrel - Black Nitride Pistol Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $249.00MSRP: $299.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56 NATO Carbine Length Gas System ...Sale: $249.00MSRP: $299.00 -
On Sale
GRID DEFENSE 16" 7.62x39 UPPER RECEIVER - BLACK
Sale: $329.00MSRP: $399.00Grid Defense 16" 7.62x39 Upper Receiver - Black Hard Coat Black Anodized Chambered in 7.62x39 14" M-Lok Rail 16" 1:10 4150 Light HBar Barrel - Black Nitride A2 Flash Hider Carbine Length Gas System Mil-Spec 7075-T6 Upper ReceiverSale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO 1:7 MID LENGTH UPPER RECEIVER WITH 12" TR MLOK RAIL
Sale: $199.99MSRP: $299.00ALWAYS ARMED 16" 5.56 NATO 1:7 MID LENGTH UPPER RECEIVER WITH 12" TR MLOK RAIL Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Steel Barrel with Black Nitride Finish Chambered in 5.56...Sale: $199.99MSRP: $299.00 -
GRID DEFENSE 16" 9MM COMPLETE UPPER ASSEMBLY
$667.50GRID DEFENSE 16" 9MM COMPLETE UPPER ASSEMBLY Hard Coat Black Anodized Chambered in 9x19 Para 14" M-Lok Rail 16" 1:10 4150 Light HBar Barrel - Black Nitride A2 Flash Hider Mil-Spec 7075-T6 Upper Receiver Titanium Nitride BCG Ambidextrous...$667.50 -
On Sale
Ghost Firearms Vital 16" 9mm Upper Receiver - Black
Sale: $224.00MSRP: $299.00Ghost Firearms Vital 16" 9MM Upper - Black Chambered in 9x19 Para A2 Birdcage Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec...Sale: $224.00MSRP: $299.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER 12" RAIL - BLACK
Sale: $179.00MSRP: $289.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER 12" RAIL - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56 NATO Carbine...Sale: $179.00MSRP: $289.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO TR SERIES WITH TRINITY FORCE SIGHTS RIFLE KIT - BLACK ANODIZED
Sale: $349.00MSRP: $519.00Always Armed 16" 5.56 NATO TRX With Trinity Force Sights Rifle Kit - Black Anodized 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...Sale: $349.00MSRP: $519.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $189.99MSRP: $299.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Chambered in 9x19 Para 16" 416R Stainless Steel Barrel 15" Free Floating MLOK Rail Hard Coat Black Anodized Finish A2 Muzzle Device - Black Nitride Finish 1:10...Sale: $189.99MSRP: $299.00 -
On Sale
ALWAYS ARMED OCTO SERIES 16" 5.56 NATO RIFLE KIT - BLACK
Sale: $349.00MSRP: $469.00ALWAYS ARMED OCTO SERIES 16" 5.56 NATO RIFLE KIT 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: $349.00MSRP: $469.00