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
Grid Defense 9" .22LR Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR Upper Receiver - OD Green Milspec 7075-T6 Upper Receiver 9" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 7" Grid Defense Octagon M-Lok Rail Finished in OD Green...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver High quality AR15 upper receivers Tungsten Gray Cerakote Finish Stainless Steel AR 15 Upper Receiver Chambered in 5.56 NATO Grid Defense Mil Spec 7075 T6 Upper Receiver Grid Defense 9" M-Lok...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - OD Green Magpul OD Green Cerakote 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 10.5" 7.62X39 UPPER RECEIVER - SIG PINK
Sale: $209.00MSRP: $299.00Always Armed 10.5" 7.62X39 Upper Receiver - Sig Pink 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 System .750 Low...Sale: $209.00MSRP: $299.00 -
Out of stock
Always Armed 16" Upper Receiver with Straight Fluted Stainless Steel Barrel and 12" Key Mod Rail
$309.00Always Armed 16" Upper Receiver with Straight Fluted Stainless Steel Barrel and 12" Key Mod Rail Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 416R Stainless Steel Barrel with Straight...$309.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 5.56 NATO COMPLETE STAINLESS STEEL UPPER RECEIVER WITH BCG/CH/ENHANCED FLASH HIDER - BLACK ANODIZED
Sale: $269.00MSRP: $469.00ALWAYS ARMED 7.5" 5.56 NATO COMPLETE STAINLESS STEEL UPPER RECEIVER - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56 NATO Pistol...Sale: $269.00MSRP: $469.00 -
On Sale
ALWAYS ARMED JESTER 16" .300 BLACKOUT RIFLE KIT - FDE
Sale: $379.00MSRP: $529.00Always Armed Jester 16" .300 Blackout Rifle Kit - FDE 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 System .750...Sale: $379.00MSRP: $529.00 -
On Sale
ALWAYS ARMED JESTER 16" 5.56 NATO RIFLE KIT - BURNT BRONZE
Sale: $379.00MSRP: $529.00Always Armed Jester 16" 5.56 NATO Rifle Kit - 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 .750...Sale: $379.00MSRP: $529.00 -
On Sale
Ghost 18" .308 Winchester Billet Upper - Blue Titanium
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - Blue Titanium Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern A2 Flash Hider 15"...Sale: $409.00MSRP: $539.00 -
Ghost 18" 5.56 NATO Rifle Length Rifle Kit
$429.00 - $449.00Ghost 18" 5.56 NATO Rifle Length Rifle Kit Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Rifle Length Gas System .750 Low...$429.00 - $449.00 -
On Sale
Ghost Firearms 7.5" 5.56 Stainless Steel Flash Can Upper Receiver - Black
Sale: $289.00MSRP: $349.00GHOST FIREARMS 7.5" 5.56 STAINLESS STEEL FLASH CAN UPPER RECEIVER Proudly Made in the USA 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver 7.5" 1:7 Twist 416R Stainless Steel Barrel Pistol Length Gas System .750 Low Profile Gas Block Flash Can...Sale: $289.00MSRP: $349.00 -
Out of stock
Ghost Firearms Elite Stainless Steel 10.5" Upper .300 Blackout - Blue Titanium
$349.00Ghost Firearms Elite 10.5".300 Stainless Steel Upper Receiver Blue Titanium Cerakote Finished Chambered in .300 Blackout (7.62x35) A2 Flash Hider 10.5" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas System ...$349.00 -
On Sale
GRID DEFENSE 10.5" 9MM UPPER RECEIVER - TUNGSTEN GRAY
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - Tungsten Gray Finished in Tungsten Gray Cerakote Mil Spec 7075-T6 Upper Receiver 10.5" 9MM Barrel Chrome Moly Vanadium 1:10 Twist Rate Straight Profile Barrel QPQ Corrosion Resistant Coating 9" Grid...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in .300 Blackout 14" M-Lok Quad Rail 16" 1:8 4150 Barrel - Black Nitride Pistol Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 16" 8.6 Blackout Billet Upper - Burnt Bronze
Sale: $429.00MSRP: $569.00Grid Defense 16" 8.6 Blackout Billet Upper - Burnt Bronze Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Carbine length gas system Chambered in 8.6 Blackout 1:10 Twist Rate M18x1.5 TPI Thread Pitch .750 Gas Block A2 Flash Hider...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 16" 9mm Upper Receiver - Tactical Grape
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Upper Receiver - Tactical Grape Finished in Purple Cerakote Milspec 7075-T6 Upper Receiver 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel - Black Nitride 14" Grid Defense Octagon M-Lok Rail A2 Muzzle Device Chambered in...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 18" 6mm ARC Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - Tungsten Gray Finished in Tungsten Gray 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 9" .22LR Upper Receiver - Black
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR Upper Receiver - Black Milspec 7075-T6 Upper Receiver 9" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 7" Grid Defense Octagon M-Lok Rail Hard Coat Black Anodize A2...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - Black
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - Black Hard Coat Black Anodized 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 14"...Sale: $329.00MSRP: $429.00 -
Out of stock
Always Armed 10.5" .300 Blackout Upper Receiver - Tungsten Gray | POW MIA
$334.00Always Armed 10.5" .300 Blackout Upper Receiver Made in the USA Mil-Spec 7075 T6 Upper Receiver with POW MIA Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in .300 Blackout Pistol Length Gas...$334.00