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
ALWAYS ARMED 16" 7.62x39 BX SERIES UPPER RECEIVER - BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED 16" 7.62x39 BX SERIES UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 4150 Barrel with Black Nitride Finish Chambered in 7.62x39 Carbine Length Gas System .750...Sale: $199.00MSRP: $299.00 -
On Sale
Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense Stainless Steel 16" .223 Wylde Upper Receiver - Black Hard Coat Black Anodized Finish Chambered in .223 Wylde 16" 416R Stainless Steel Barrel 1:8 Twist Rate 1/2x28 TPI Thread Pitch Stainless A2 Muzzle Device Carbine Length Gas...Sale: $329.00MSRP: $399.00 -
Out of stockOn Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL ULTRALIGHT UPPER RECEIVER WITH 13.5" RAIL - BLACK
Sale: $199.00MSRP: $269.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 13.5" RAIL - BLACK Chambered in 9x19 Para Made in the USA 16" 416R Stainless Steel Barrel 1:10 Twist Rate 13.5" Ultralight Free Floating MLOK Rail Hard Coat Black Anodized Finish...Sale: $199.00MSRP: $269.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, BI-POD, AND SIGHTS - BLACK
Sale: $219.00MSRP: $369.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, BI-POD, 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 -
Out of stock
ALWAYS ARMED 20" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL
$299.00ALWAYS ARMED 20" 5.56 NATO UPPER RECEIVER WITH 15" M-LOK QUAD RAIL Made in the USA 7075-T6 Mil-Spec Upper Receiver 20" 4150 Steel Barrel Chambered in 5.56 NATO 15" Free Floating MLOK Quad Rail Black Anodized Finish Rifle Length Gas System A2...$299.00 -
Out of stock
ALWAYS ARMED COMPLETE 7.5" 5.56 NATO UPPER RECEIVER WITH 7" KEYMOD RAIL, BCG, CHARGING HANDLE & SIGHTS
$399.00ALWAYS ARMED COMPLETE 7.5" 5.56 NATO UPPER RECEIVER - 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 Gas...$399.00 -
On Sale
Ghost Firearms 7.5" 9mm Stainless Steel Flash Can Upper Receiver - Black
Sale: $249.00MSRP: $349.00Ghost Firearms 7.5" 9mm Stainless Steel Flash Can Upper Receiver - Black Proudly Made in the USA Chambered in 9mm 7075 T6 Forged Aluminum Mil-Spec AR15 Upper Receiver 7.5" 1:10 Twist 416R Stainless Steel Barrel 1/2x36 Thread Pattern Flash Can...Sale: $249.00MSRP: $349.00 -
On Sale
Ghost Vital 16" Upper 7.62x39
Sale: $249.00MSRP: $299.00Ghost Firearms Vital 16" Upper Chambered in 7.62x39 A2 Birdcage Flash Hider 16" 1:10 Twist 4150 Light HBar Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost...Sale: $249.00MSRP: $299.00 -
ALWAYS ARMED 10.5" .300 BLACKOUT TR SERIES WITH TRINITY FORCE SIGHTS PISTOL KIT - BLACK ANODIZED
$489.00Always Armed 10.5" .300 Blackout TRX Series with Trinity Force Sights Pistol Kit - Black Anodized Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:8 Twist 4150 Barrel with Black Nitride...$489.00 -
ALWAYS ARMED 10.5" 5.56 NATO UPPER RECEIVER WITH 12" MLOK RAIL & TEQUILA SUNRISE FLASH CAN - BLACK
$299.00ALWAYS ARMED 10.5" 5.56 NATO FLAHS CAN UPPER RECEIVER Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length Gas System ...$299.00 -
On Sale
ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK
Sale: $209.00MSRP: $299.00ALWAYS ARMED 16" 9MM STAINLESS STEEL BX SERIES UPPER RECEIVER - BLACK Made in the USA 16" 416R Stainless Steel Barrel Chambered in 9X19 Para 15" BX Series Free Floating MLOK Rail Black Anodized Finish 16 Inch 9mm Upper Receiver A2 Muzzle Device -...Sale: $209.00MSRP: $299.00 -
On Sale
Grid Defense 20" 350 Legend Upper Receiver - Black
Sale: $349.00MSRP: $419.00Grid Defense 20" .350 Legend Upper Receiver - Black Hard Coat Black Anodized Chambered in .350 Legend 14" Free Float M-Lok Rail 20" 1:16 4150 Barrel - Black Nitride Carbine Length Gas System 5/8x24 Thread Pitch A2 Flash Hider Mil-Spec 7075-T6...Sale: $349.00MSRP: $419.00 -
On Sale
ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 4.5" 9MM FLASH CAN UPPER RECEIVER WITH 4" TR RAIL - BLACK ANODIZED Made in the USA Mil Spec AR15 9mm Flash Can Upper Receiver 4.5" 1:10 Twist Barrel with Black Nitride Finish 4" TR Series Free Float M-LOK Rail Flash...Sale: $189.00MSRP: $269.00 -
Out of stock
Ghost Firearms • Magpul 5.56 A2 Complete Rifle Kit Minus Lower
$499.00Ghost Firearms Magpul™ A2 Rifle Kit comes with a complete A2 upper, LPK, and Magpul™ Moe Stock assembly. Everything needed to build an AR-15 / M4 rifle minus the lower receiver. UPPER: Ghost Firearms...$499.00 -
Out of stock
Grid Defense GX2 7.5" 5.56 Flash Can Upper Receiver - Black Anodized
$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...$399.00 -
On Sale
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BLACK
Sale: $219.00MSRP: $399.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BLACK Chambered in .22LR Hard Coat Black Anodized Finish Made In The USA 4.5" 1:16 Twist 4140 CrMo Barrel Salt bath nitride finished barrel 1/2"-28 TPI Medium taper barrel profile 4.25" TRX...Sale: $219.00MSRP: $399.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - BLACK ANODIZED Made in the USA 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 Pistol...Sale: $189.00MSRP: $269.00 -
On Sale
BLEM ALWAYS ARMED OCT2 SERIES 16" 5.56 NATO UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $269.00BLEMISHED ALWAYS ARMED OCT2 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" 1:7 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO .750...Sale: $179.00MSRP: $269.00 -
GHOST FIREARMS 7.5" FLASH CAN UPPER RECEIVER WITH FDE FLASH CAN AND LASER ENGRAVED DUST COVER
$359.00GHOST FIREARMS 7.5" FLASH CAN UPPER RECEIVER Hard Coat Black Anodized Finish Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride Chambered in 5.56x45 NATO .750 Low Profile Gas Block Pistol Length Gas System Ghost...$359.00 -
On Sale
Ghost Vital 10.5" 5.56 American Flag Dust Cover Upper Receiver - Black
Sale: $239.00MSRP: $299.00Ghost Firearms Vital 10.5" Upper With American Flag Dust Cover - Black Chambered in 5.56 NATO Mil Spec Upper Receiver with Dust Cover and Forward Assist A2 Birdcage Flash Hider 10.5" 1:7 4150 M4 Barrel - Black Nitride Carbine...Sale: $239.00MSRP: $299.00