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 Fireams 10.5" 300 Blackout with M-Lok 9" Pistol Kit - FDE
Sale: $429.00MSRP: $579.00Ghost Firearms 10.5" .300 Pistol Kit - FDE Flat Dark Earth (FDE) Cerakote Finish Chambered in 300 AAC Blackout (7.62x35mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:8 Twist 4150 Chrome Moly Steel...Sale: $429.00MSRP: $579.00 -
On Sale
GHOST FIREARMS 16" 5.56 NATO MID LENGTH UPPER RECEIVER - FDE
Sale: $269.00MSRP: $349.00GHOST FIREARMS 16" 5.56 NATO MID LENGTH UPPER RECEIVER - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 4150 Steel Mid Length Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid...Sale: $269.00MSRP: $349.00 -
On Sale
Ghost Firearms 7.5" .300 Blackout Flash Can Upper Receiver Pistol Kit - Tactical Grape
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit Finished in Purple Cerakote Milspec 7075-T6 Upper Receiver 7.5" 1:8 4150 Light HBar Barrel - Black Nitride Chambered in .300 Blackout (7.62x35) .750 Low Profile Gas Block Pistol Length Gas...Sale: $449.00MSRP: $599.00 -
On Sale
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver FDE - Matching
Sale: $359.00MSRP: $399.00Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver FDE - Matching Proudly Made in the USA 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel Black Nitride Finished in Flat Dark Earth Cerakote Pistol Length Gas...Sale: $359.00MSRP: $399.00 -
On Sale
Ghost IHS 5" 5.56 NATO Upper Receiver - Gold
Sale: $269.00MSRP: $339.00Ghost IHS 5" 5.56 Upper - Gold Cerakote FX Gold Upper Receiver Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 5" 1:5 Twist 4150 Chrome Moly Vanadium Barrel 1/2x28 Thread Pitch Micro Length Gas System Ghost 4.25" Integral...Sale: $269.00MSRP: $339.00 -
On Sale
Ghost Vital 16" Black Upper 5.56 NATO With Tungsten Gray 11" Rail
Sale: $259.00MSRP: $329.00Ghost Vital 16" Black Upper 5.56 NATO With 11" Tungsten Gray Rail - Black Chambered in 5.56 NATO 16" 1:7 Twist 4150 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Finished in Tungsten...Sale: $259.00MSRP: $329.00 -
Out of stock
GRID DEFENSE 10.5" 5.56 UPPER RECEIVER W/ BCG, CHARGING HANDLE, MBUS & AXE BRAKE
$559.00GRID DEFENSE 10.5" 5.56 STAINLESS STEEL COMPLETE UPPER RECEIVER W/ MBUS & AXE BRAKE Hard Coat Black Anodized Finish Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 416R Stainless Steel M4 Profile Barrel Chambered in 5.56x45...$559.00 -
Out of stockOn Sale
Grid Defense 16" .308 Winchester Billet Upper - Black
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - Black 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 -
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 5/8x24 TPI Thread Pitch .750 Gas Block A2 Flash...Sale: $429.00MSRP: $569.00 -
On Sale
Grid Defense 16" 9mm Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 9mm Upper Receiver - Burnt Bronze Finished in Burnt Bronze 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...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
Grid Defense 18" .308 Winchester Billet Upper - OD Green
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - OD Green Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch Axe Brake Muzzle...Sale: $439.00MSRP: $579.00 -
Out of stockOn Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Pink Champagne
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver - Pink Champagne Finished in Pink Champagne Cerakote AR15 Skeletonized Upper Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 M4 Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 7.5" 7.62x39 Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 7.62x39 Upper Receiver - Tungsten Gray Chambered in 7.62x39 Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System A2 Flash...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 9" .22LR Flash Can Upper Receiver - Black
Sale: $299.00MSRP: $399.00Grid Defense 9" .22LR Flash Can 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 9" Grid Defense Octagon M-Lok Rail Hard Coat Black...Sale: $299.00MSRP: $399.00 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Black
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - Black Hard Coat Black Anodized Finish Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Pistol Length...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 -
On Sale
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - FDE
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Magpul Flat Dark Earth Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 7.5" 1:8 Twist 416R Stainless Steel Light HBar Barrel Pistol Length Gas...Sale: $299.00MSRP: $399.00 -
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 -
Out of stock
ALWAYS ARMED 10.5" 5.56 NATO FLASH CAN UPPER RECEIVER - MAGPUL FDE/OD GREEN LIMITED EDITION
$358.00Always Armed 10.5" 5.56 NATO Flash Can Upper Receiver - LIMITED EDITION Made in the USA Magpul FDE Mil-Spec 7075 T6 Upper Receiver Forward Assist Timber Creek Outdoors Billet Dust Cover - OD Green 10.5" 1:7 Twist 4150 Barrel with Black...$358.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO BX SERIES UPPER RECEIVER - TUNGSTEN GRAY
Sale: $219.00MSRP: $319.00ALWAYS ARMED 16" 5.56 NATO BX SERIES 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...Sale: $219.00MSRP: $319.00