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 Vital 16" Black Upper 5.56 NATO With Blue Titanium 11" Rail
Sale: $259.00MSRP: $329.00Ghost Vital 16" Black Upper 5.56 NATO With 11" Blue Titanium 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 Blue...Sale: $259.00MSRP: $329.00 -
On Sale
GRID DEFENSE 16" .450 BUSHMASTER UPPER RECEIVER - BLUE TITANIUM
Sale: $349.00MSRP: $419.00Grid Defense 16" .450 Bushmaster Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Chambered in .450 Bushmaster 14" Free Floating M-Lok Handrail 16" 4150 Black Nitride Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch .875 Gas...Sale: $349.00MSRP: $419.00 -
On Sale
GRID DEFENSE 16" .450 BUSHMASTER UPPER RECEIVER - FDE
Sale: $349.00MSRP: $419.00Grid Defense 16" .450 Bushmaster Upper Receiver - FDE Hard Coat Flat Dark Earth Finish Chambered in .450 Bushmaster 14" Free Floating M-Lok Handrail 16" 4150 Black Nitride Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch .875 Gas Block Carbine...Sale: $349.00MSRP: $419.00 -
Out of stock
Grid Defense 16" 5.56 Quad Rail Upper Receiver with Timber Creek Accessories - Blue Titanium
$757.97Grid Defense 16" 5.56 Quad Rail Upper Receiver With Timber Creek Red Accessories - Blue Titanium Grid Defense 16" 5.56 Quad Rail Upper Receiver - Blue Titanium Blue Titanium Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 4150 M4...$757.97 -
On Sale
Grid Defense 18" 350 Legend Upper Receiver - Blue Titanium
Sale: $349.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - Blue Titanium Blue Titanium 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...Sale: $349.00MSRP: $419.00 -
Out of stockOn Sale
Grid Defense 20" 6.5 Grendel Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $419.00Grid Defense 20" 6.5 Grendel Upper Receiver - Blue Titanium Upper Specifications Mil-Spec Upper Design Machined from 7075-T6 Forging Mil-Spec dust cover and forward assist Made in the USA 14" Free Float Handguard Finished in Blue Titanium...Sale: $329.00MSRP: $419.00 -
Out of stock
Grid Defense Limited Edition Stainless Steel 16" 5.56 Upper Receiver with Nickel Boron BCG and Red Strike Industries Accessories
$691.85Grid Defense Limited Edition Stainless Steel 16" 5.56 Upper Receiver 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 14"...$691.85 -
On Sale
ALWAYS ARMED 16" JESTER UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT - FDE
Sale: $458.00MSRP: $658.00Always Armed 16" 5.56 NATO Jester Upper Receiver - FDE 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: $458.00MSRP: $658.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - BLUE TITANIUM
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - BLUE TITANIUM Finished in Blue Titanium Cerakote Chambered in 450 Bushmaster 16" 4150 Chrome Moly Barrel 1:24 Twist Rate 11/16x24 TPI Thread Pitch 14" Free Float M-LOK Handrail A2 Muzzle...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" 350 Legend Rifle Kit - Blue Titanium
Sale: $449.00MSRP: $519.00Ghost 18" 350 Legend Rifle Kit - Blue Titanium Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:16 Twist 4150 Barrel with Black Nitride Finish Chambered in 350 Legend Carbine Length Gas System .750 Low...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" 6mm ARC Rifle Kit - Blue Titanium
Sale: $449.00MSRP: $519.00Ghost 18" 6mm ARC Rifle Kit - Blue Titanium Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 6mm ARC Mid Length Gas System .750 Low Profile...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" 6mm ARC Rifle Kit - FDE
Sale: $449.00MSRP: $519.00Ghost 18" 6mm ARC Rifle Kit - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 6mm ARC Mid Length Gas System .750 Low Profile Gas...Sale: $449.00MSRP: $519.00 -
On Sale
GHOST STAINLESS STEEL 10.5" .223 WYLDE PISTOL KIT - FDE
Sale: $439.00MSRP: $579.00GHOST STAINLESS STEEL 10.5" .223 WYLDE RIFLE KIT - FDE Finished in FDE Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch 9" Free Float M-LOK Handrail Stainless A2 Muzzle Device Mil-Spec 7075-T6...Sale: $439.00MSRP: $579.00 -
Out of stock
GRID DEFENSE 16" .300 BLACKOUT UPPER RECEIVER WITH STAINLESS STEEL BARREL, AXE BRAKE AND MBUS SIGHTS - BLUE TITANIUM
$526.50GRID DEFENSE 16" .300 BLACKOUT UPPER RECEIVER Finished in Blue Titanium Cerakote Chambered in .300 Blackout 14" Aluminum M-LOK Hand Guard 16" 1:8 416R Stainless Steel Barrel Pistol Length Gas System Stainless Steel AXE Brake Mil-Spec 7075-T6 Upper...$526.50 -
Out of stockOn Sale
Grid Defense 16" .308 Winchester Billet Upper - Blue Titanium
Sale: $429.00MSRP: $569.00Grid Defense 16" .308 Winchester Billet Upper - Blue Titanium 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...Sale: $429.00MSRP: $569.00 -
Out of stockOn Sale
Grid Defense 16" 8.6 Blackout Billet Upper - FDE
Sale: $429.00MSRP: $569.00Grid Defense 16" 8.6 Blackout Billet Upper - FDE 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 Hider Muzzle...Sale: $429.00MSRP: $569.00 -
Out of stockOn Sale
Grid Defense 18" .308 Winchester Billet Upper - Blue Titanium
Sale: $439.00MSRP: $579.00Grid Defense 18" .308 Winchester Billet Upper - Blue Titanium 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...Sale: $439.00MSRP: $579.00 -
On Sale
Grid Defense 18" 6.5 Creedmoor Billet Upper - Blue Titanium
Sale: $389.00MSRP: $579.00Grid Defense 18" 6.5 Creedmoor Billet Upper - Blue Titanium Upper Specifications Billet Upper Receiver Machined from 6061 Aluminum Fits DPMS Gen 1 Lower Receivers Made in the USA High Profile 15" Free Float M-LOK Handguard Finished in Blue...Sale: $389.00MSRP: $579.00 -
On Sale
Ghost 18" 350 Legend Rifle Kit - FDE
Sale: $449.00MSRP: $519.00Ghost 18" 350 Legend Rifle Kit - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 18" 1:16 Twist 4150 Barrel with Black Nitride Finish Chambered in 350 Legend Carbine Length Gas System .750 Low Profile Gas...Sale: $449.00MSRP: $519.00 -
Aero Precision 16" 5.56 NATO Upper Receiver - FDE
$534.99Aero Precision 16" 5.56 NATO Upper Receiver - FDE M4E1 Threaded Assembled Upper Receiver ATLAS S-ONE M-LOK Handguard of choice 16" 5.56 CMV Barrel Low Profile Gas Block and Mid-Length Gas Tube Product comes assembled This complete upper does not...$534.99