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" 9MM Rifle Kit- BURNT BRONZE
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Burnt Bronze Cerakote Chambered in 9x19 Para 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $459.00MSRP: $729.00 -
On Sale
Grid Defense 16" 300 Blackout Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 300 Blackout Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 16" 1:8 Twist 4150 Light HBar Barrel Pistol Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 9" .22LR Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 9" .22LR Flash Can Upper Receiver - Burnt Bronze Milspec 7075-T6 Upper Receiver 9" 4150 Black Nitride Barrel Pencil Lightweight Profile Barrel 1:16 Twist Rate 1/2x28 Thread Pattern 9" Grid Defense Octagon M-Lok Rail Burnt Bronze Cerakote...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Ghost Elite Stainless Steel 16" Upper .300 Blackout - Burnt Bronze
Sale: $329.00MSRP: $399.00Ghost Elite Stainless Steel 16" 300 Blackout Upper Receiver - Burnt Bronze Burnt Bronze 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...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Firearms 10.5" 5.56 Flash Can Upper Receiver Pistol Kit - OD Green
Sale: $449.00MSRP: $599.00Ghost Firearms 10.5" Flash Can Upper Receiver Pistol Build Kit Finished in Magpul Olive Drab Green 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...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 16" 9MM Rifle Kit - OD GREEN
Sale: $459.00MSRP: $729.00GHOST FIREARMS 16" 9MM RIFLE KIT Finished in Magpul OD Green Cerakote Chambered in 9x19 Para 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle Device Mil-Spec 7075-T6 Upper...Sale: $459.00MSRP: $729.00 -
Out of stockOn Sale
Ghost 18" .308 Winchester Billet Upper - Olive Drab Green
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - Olive Drab Green 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...Sale: $409.00MSRP: $539.00 -
Out of stockOn Sale
Ghost 20" .308 Winchester Billet Rifle Kit - OD Green
Sale: $619.00MSRP: $749.00Ghost 20" .308 Winchester Billet Rifle Kit - OD Green Billet DPMS Pattern High Profile Upper 20" 4150 Chrome Moly HBAR Contour Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash Hider 15" M-LOK...Sale: $619.00MSRP: $749.00 -
On Sale
Ghost Firearms 7.5" 300 Blackout with 7" M-Lok Pistol Kit - OD Green
Sale: $379.00MSRP: $579.00Ghost Firearms 7.5".300 Pistol Kit - OD Green OD Green Cerakote Finished Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 7.5" 1:8 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $379.00MSRP: $579.00 -
On Sale
Ghost Firearms 7.5" 5.56mm with 7" M-Lok Pistol Kit - Burnt Bronze
Sale: $379.00MSRP: $579.00Ghost Firearms 7.5" 5.56 Pistol Kit - Burnt Bronze Burnt Bronze 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...Sale: $379.00MSRP: $579.00 -
Out of stockOn Sale
Grid Defense 16" .308 Winchester Billet Upper - OD Green
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - OD Green Billet DPMS High Profile Pattern upper 16" 4150 chrome moly barrel Mid-length gas system Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle Device 15"...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 18" 350 Legend Upper Receiver - OD Green
Sale: $349.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - OD Green Magpul OD Green Cerakote Finish Chambered in 350 Legend A2 Flash Hider 18" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid Defense...Sale: $349.00MSRP: $419.00 -
On 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 -
Out of stockOn Sale
Grid Defense GX2 7.5" 5.56 Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense GX2 7.5" 5.56 NATO Flash Can Upper Mil-Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO 9" Grid Defense GX2 Octagon M-Lok Rail Dimpled Flash Can Pistol Length Gas System Made in the...Sale: $329.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT PISTOL KIT - BURNT BRONZE
Sale: $359.00MSRP: $499.00Always Armed 7.5" 300 Blackout Pistol Kit - Burnt Bronze Made in the USA Mil-Spec Lower Parts Kit Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 300 Blackout...Sale: $359.00MSRP: $499.00 -
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 -
On Sale
Grid Defense Stainless Steel 10.5" 5.56 Upper Receiver - Burnt Bronze
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 10.5" 556 Upper Receiver Burnt Bronze Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 10.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Carbine Length Gas System Grid Defense 9" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
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 -
On Sale
Ghost 18" .308 Winchester Billet Upper - Burnt Bronze
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - Burnt Bronze 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