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 18" 350 Legend Upper Receiver - Black
Sale: $349.00MSRP: $419.00Grid Defense 18" .350 Legend Upper Receiver - Black Hard Coat Black Anodized Chambered in .350 Legend 14" Free Float M-Lok Rail 18" 1:16 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6 Upper...Sale: $349.00MSRP: $419.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - OD Green
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - OD Green Magpul OD Green Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 14" M-Lok Free Float Hand Guard Grid...Sale: $349.00MSRP: $419.00 -
Out of stock
GRID DEFENSE GX2 10.5" 5.56 UPPER RECEIVER - BLACK
$379.00Grid Defense GX2 10.5" 5.56 Upper Receiver Hard Coat Black Anodized Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black Nitride .750 Low Profile Gas Block Carbine Length Gas System 9" Grid Defense GX2...$379.00 -
On Sale
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - OD Green
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Magpul OD Green Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 7.5" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile Pistol Length Gas System Grid Defense 7" M-Lok Free Float...Sale: $299.00MSRP: $399.00 -
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND AFG - BLACK
$369.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND AFG - 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 -
Out of stockOn Sale
ALWAYS ARMED LIGHTWEIGHT SERIES 16" 5.56 NATO UPPER RECEIVER WITH 12" RAIL - BLACK
Sale: $219.00MSRP: $319.00ALWAYS ARMED LIGHTWEIGHT SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" Pencil Profile 4150 Steel Barrel with Black Nitride Finish Chambered in 5.56 NATO Mid...Sale: $219.00MSRP: $319.00 -
Out of stockOn Sale
GHOST 16" .308 WINCHESTER COMPLETE UPPER RECEIVER - BLACK
Sale: $529.00MSRP: $657.00GHOST 16" .308 WINCHESTER COMPLETE UPPER RECEIVER - BLACK DPMS Pattern Upper (Low Profile) Mil-Spec Dust Cover and Forward Assist 16" 4150 HBAR Contour Barrel - Black Nitride Mid-length gas system Chambered in .308 Winchester with a 1:10 twist rate...Sale: $529.00MSRP: $657.00 -
Out of stock
Ghost Fireams Elite Stainless Steel 16" Upper .300 Blackout - OD Green
$379.00Ghost Firearms Elite Stainless Steel 16".300 AAC Blackout Upper - OD Green The new .300 blackout upper receiver with A2 flash can. OD Green Cerakote Finish Chambered in .300 Blackout (7.62x35) Stainless Steel A2 Flash Hider 16" 1:8 Twist 416R Stainless...$379.00 -
On Sale
GRID DEFENSE 10.5" 9MM UPPER RECEIVER - OD GREEN
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - OD Green Finished in Olive Drab Green 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 Defense...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 18" 6mm ARC Upper Receiver - OD Green
Sale: $329.00MSRP: $419.00Grid Defense 18" 6mm ARC Upper Receiver - OD Green Finished in OD Green 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 Pitch A2 Flash...Sale: $329.00MSRP: $419.00 -
On Sale
Grid Defense 9" .22LR Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 9" .22LR Upper Receiver - Tungsten Gray 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 Tungsten Gray...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00Grid Defense Stainless Steel 10.5" .223 Wylde Upper Receiver - OD Green Finished in Magpul OD Green Cerakote Chambered in .223 Wylde 10.5" 416R Stainless Steel Barrel 1:7 Twist Rate 1/2x28 TPI Thread Pitch Black A2 Muzzle Device Pistol...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - OD Green
Sale: $299.00MSRP: $399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Magpul Olive Drab Green 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 System...Sale: $299.00MSRP: $399.00 -
Out of stock
Aero Precision 16" 9mm Upper Receiver - Black
$489.99Aero Precision 16" 9mm Upper Receiver - Black EPC-9 Upper Receiver Chambered in 9mm 1:10 Twist Barrel 15" ATLAS S-ONE Handguard 16" CMV Barrel Product comes assembled This complete upper receiver does not include BCG or Charging Handle$489.99 -
Out of stockOn Sale
ALWAYS ARMED 16" .308 WIN UPPER RECEIVER WITH 12" M-LOK HAND GUARD - BLACK
Sale: $299.00MSRP: $429.00ALWAYS ARMED 16" .308 WIN UPPER RECEIVER WITH 12" M-LOK RAIL - BLACK DPMS Pattern Upper Receiver Dust Cover and Forward Assist 16" 4150 HBAR Contour Barrel - Black Nitride Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread...Sale: $299.00MSRP: $429.00 -
On Sale
GHOST 16" .450 BUSHMASTER RIFLE KIT - OD GREEN
Sale: $449.00MSRP: $519.00GHOST 16" .450 BUSHMASTER RIFLE KIT - OD GREEN Finished in OD Green 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 Device Mil-Spec 7075-T6...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 18" 350 Legend Rifle Kit - OD Green
Sale: $449.00MSRP: $519.00Ghost 18" 350 Legend Rifle Kit - OD Green 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...Sale: $449.00MSRP: $519.00 -
On Sale
Ghost 9" .22LR Pistol Kit - OD Green
Sale: $480.00MSRP: $599.00Ghost 9" .22LR Pistol Kit - OD Green Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9" 4150 Black Nitride Barrel Lightweight Pencil Profile Barrel 1:16 Twist Rate 1/2x28 TPI Thread Pitch Chambered in .22...Sale: $480.00MSRP: $599.00 -
Out of stock
Ghost Vital 7.5" .300 Blackout Pistol Build Kit With Nickel Boron lower parts kit
$499.00Ghost Firearms Vital 7.5" .300 Upper A2 Birdcage Flash Hider 7.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 7" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper Receiver Mil-Spec Hard...$499.00 -
Out of stock
Grid Defense 16" .300 Quad Rail Upper Receiver with Stainless Steel 1:8 Barrel and AXE Brake - Black
$478.99Grid Defense 16" .300 Quad Rail Upper Receiver Black Anodized Finish Chambered in .300 Blackout 14" M-Lok Quad Rail 16" 1:8 416R Stainless Steel Barrel Pistol Length Gas System Stainless Steel AXE Brake Mil-Spec 7075-T6 Upper Receiver$478.99