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 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
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, AFG, AND SIGHTS - BLACK
Sale: $219.00MSRP: $369.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, AFG, AND SIGHTS - BLACK Chambered in 9x19 Para Made in the USA 16" 416R Stainless Steel Barrel 1:10 Twist Rate 12" Free Floating MLOK Rail Hard Coat Black Anodized...Sale: $219.00MSRP: $369.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH ENHANCED MUZZLE DEVICE - BLACK ANODIZED
Sale: $209.00MSRP: $289.00ALWAYS ARMED 7.5" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH ENHANCED MUZZLE DEVICE - 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...Sale: $209.00MSRP: $289.00 -
On Sale
ALWAYS ARMED BX SERIES 7.5" 5.56 NATO PISTOL KIT - BLACK ANODIZED
Sale: $339.00MSRP: $449.99ALWAYS ARMED BX SERIES 7.5" 5.56 NATO PISTOL KIT - BLACK ANODIZED Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Pistol Length...Sale: $339.00MSRP: $449.99 -
Out of stock
ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER WITH STAINLESS STEEL BARREL - BLACK
$349.00ALWAYS ARMED OCTO SERIES 7.5" .300 BLACKOUT FLASH CAN UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 BLACKOUT Pistol Length Gas System ...$349.00 -
ALWAYS ARMED OCTO SERIES 7.5" 5.56 NATO WTIH ZOMBIE GREEN FLASH CAN UPPER RECEIVER - BLACK
$319.00ALWAYS ARMED OCTO SERIES 7.5" 5.56 NATO FLASH CAN UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Pistol Length Gas...$319.00 -
Ghost Vital 10.5" 5.56 Upper Receiver with 1:8 Twist Stainless Steel Barrel
$309.00Ghost Vital 10.5" 5.56 Upper Receiver with 1:8 Twist Stainless Steel Barrel Chambered in 5.56x45 NATO (5.56/.223) Stainless Steel A2 Birdcage Flash Hider 10.5" 1:7 Twist 416R Stainless Steel Barrel Carbine Length Gas System Ghost...$309.00 -
Out of stock
Ghost Vital 16" .300 Blackout Rifle Build Kit With Nickel Boron lower parts kit
$529.00Ghost Vital 16" .300 Blackout Rifle Build Kit With Nickel Boron LPK Ghost Firearms Vital 16" Upper Chambered in .300 Blackout (7.62x35) A2 Birdcage Flash Hider 300 Blackout Ghost Gun 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride...$529.00 -
On Sale
Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense 16" .300 Blackout Quad Rail Upper Receiver - Black Black Anodized Finish Chambered in .300 Blackout A2 Flash Hider 16" 1:8 Twist 4150 Barrel - Black Nitride Pistol Length Gas System Grid Defense 14" M-Lok Free Float Quad Rail Grid Defense...Sale: $329.00MSRP: $399.00 -
Grid Defense 16" 5.56 Rifle Kit with Magpul Accessories - Black
$717.90Grid Defense 16" 5.56 Upper Receiver - Black Premium AR upper receiver, the new 5.56 AR upper from Grid Defense.With hard coat black anodized. Chambered in 5.56x45 NATO Skeletonized Upper Receivers 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black...$717.90 -
Out of stockOn Sale
ALWAYS ARMED 16" STAINLESS STEEL 9MM LIGHTWEIGHT RIFLE KIT - BLACK
Sale: $349.00MSRP: $519.00Always Armed 16" Stainless Steel 9MM Lightweight Rifle Kit - Black Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 16" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para 1/2x36 A2 Flash Hider - Black 12" Free Float M-LOK...Sale: $349.00MSRP: $519.00 -
On Sale
Ghost 16" .308 Winchester Billet Rifle Kit - Black
Sale: $579.00MSRP: $709.00Ghost 16" .308 Winchester Billet Rifle Kit - Black Billet DPMS Pattern High Profile Upper 16" 4150 Chrome Moly HBAR Contour Barrel Mid Length Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 TPI Thread Pitch A2 Flash...Sale: $579.00MSRP: $709.00 -
Out of stock
Ghost Vital 7.5" 5.56 Pistol Build Kit With Nickel Boron Lower Parts kit
$499.00Ghost Firearms Vital 7.5" Upper Premium quality AR-15 pistol build kits, the Defense Grid 5.56 pistol kit, with complete lower parts and pistol buffer tube kit. Chambered in 5.56x45 NATO (5.56/.223) A2 Birdcage Flash Hider 10.5" 1:7...$499.00 -
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 -
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 -
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