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 10.5" 9MM UPPER RECEIVER - FDE
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 9mm Upper Receiver - FDE Finished in Flat Dark Earth Cerakote Mil Spec 7075-T6 Upper Receiver 10.5" 9MM Barrel Chrome Moly Vanadium 1:10 Twist Rate Straight Profile...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED Jester 16" 5.56 NATO UPPER RECEIVER WITH 12" RAIL- BLACK
Sale: $199.00MSRP: $299.00ALWAYS ARMED JESTER 16" 5.56 NATO UPPER RECEIVER Made in the USASale: $199.00MSRP: $299.00 -
On Sale
ALWAYS ARMED TR SERIES 16" 9MM STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $209.00MSRP: $339.00ALWAYS ARMED 16" 9MM UPPER RECEIVER Made in the USA 16" 416R Stainless Steel Barrel Chambered in 9X19 Para 15" Free Floating MLOK Rail Black Anodized Finish A2 Muzzle Device - Black Nitride Finish...Sale: $209.00MSRP: $339.00 -
Out of stockOn Sale
7.5" 9MM WITH M-LOK 7" PISTOL KIT - TACTICAL GRAPE
Sale: $389.00MSRP: $669.00Ghost Firearms 7.5" Pistol Kit - Tactical Grape Tactical Grape Cerakote Finish Chambered in 9mm 9mm Bolt Carrier Group (Colt and Glock cut) Mil-spec Charging Handle A2 Flash Hider 1/2x36 Thread...Sale: $389.00MSRP: $669.00 -
On Sale
Ghost Firearms 7.5" 300 Blackout with 7" M-Lok Pistol - Kit Blue Titanium
Sale: $439.00MSRP: $579.00Ghost Firearms 7.5".300 Pistol Kit - Blue Titanium Premium AR-15 pistol build kit, the new 300 blackout pistol kit from Ghost Firearms. Features M16 BCG and mil-spec charging handle. Blue Titanium...Sale: $439.00MSRP: $579.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $279.00ALWAYS ARMED 7.5" .300 BLACKOUT STAINLESS STEEL UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 7.5" 1:8 Twist 416R Stainless Steel...Sale: $179.00MSRP: $279.00 -
On Sale
ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE
Sale: $209.00MSRP: $299.00ALWAYS ARMED TR SERIES 10.5" .300 BLACKOUT UPPER RECEIVER - FDE Made in the USA Magpul FDE Cerakote Finish Mil-Spec AR15 7075 T6 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float...Sale: $209.00MSRP: $299.00 -
On Sale
Grid Defense 10.5" .300 Blackout Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense 10.5" .300 Blackout Upper Receiver - Blue Titanium Finished in Blue Titanium Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 4150 Steel Barrel - Black Nitride Chambered in .300...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 5.5" 9MM TR SERIES FLASH CAN UPPER RECEIVER - FDE
Sale: $219.00MSRP: $299.00ALWAYS ARMED 5.5" 9MM TR SERIES FLASH CAN UPPER RECEIVER - FDE Made in the USA Mil Spec AR15 Upper Receiver 1/2 x 36 thread pitch 5.5" 1:10 Twist 4150 Steel Barrel 7" TR Series Free Float M-LOK...Sale: $219.00MSRP: $299.00 -
Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Tactical Grape
$399.00Grid Defense 10.5" 5.56 Flash Can Upper Receiver Finished in Purple Cerakote 5.56 Upper Receiver Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 4150 M4 Profile Barrel - Black...$399.00 -
On Sale
Grid Defense 7.5" 5.56 Upper Receiver - OD Green
Sale: $299.00MSRP: $379.00GRID DEFENSE 7.5" 5.56 OD GREEN UPPER RECEIVER Finished in Magpul Olive Drab Green Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride 7" Grid Defense Octagon...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense Stainless Steel 16" 5.56 Upper Receiver - Flat Dark Earth
Sale: $329.00MSRP: $429.00Grid Defense Stainless Steel 16" 556 Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in 5.56 NATO Stainless Steel A2 Flash Hider 16" 1:7 Twist 416R Stainless Steel Barrel - M4 Profile...Sale: $329.00MSRP: $429.00 -
ALWAYS ARMED 16" 9MM UPPER RECEIVER WITH 15" M-LOK QUAD RAIL
$329.00ALWAYS ARMED 16" 9MM UPPER RECEIVER WITH 15" M-LOK QUAD RAIL Made in the USA 16" 4150 Barrel Chambered in 9X19 Para 15" Free Floating MLOK Quad Rail Black Anodized Finish A2 Muzzle Device 1:10 Twist...$329.00 -
On Sale
ALWAYS ARMED 16" STAINLESS STEEL 9MM RIFLE KIT - BLACK
Sale: $349.00MSRP: $519.00Always Armed 16" Stainless Steel 9mm 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...Sale: $349.00MSRP: $519.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 300 BLACKOUT TR SERIES UPPER RECEIVER - MAGPUL FDE
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout TR Series Upper Receiver - Magpul FDE 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...Sale: $209.00MSRP: $299.00 -
On Sale
GHOST 16" 5.56 MID LENGTH RIFLE KIT - BLACK
Sale: $429.00MSRP: $499.00GHOST 16" 5.56 MID LENGTH RIFLE KIT - BLACK Hard Coat Black Anodized Chambered in 5.56 NATO 16" 1:7 Twist 4150 M4 Black Nitride Barrel 14" Ghost Firearms Free Float M-LOK Rail A2 Muzzle...Sale: $429.00MSRP: $499.00 -
On Sale
Ghost 18" .308 Winchester Billet Upper - FDE
Sale: $409.00MSRP: $539.00Ghost 18" .308 Winchester Billet Upper - FDE Billet DPMS Pattern High Profile Upper Receiver 18" 4150 Chrome Moly HBAR Contour Barrel Rifle Length Gas System Chambered in .308 Winchester 1:10 Twist...Sale: $409.00MSRP: $539.00 -
On Sale
Ghost Vital 16" Upper .300 Blackout With 11" Rail - Black
Sale: $239.00MSRP: $299.00Ghost Vital 16" Upper .300 Blackout With 11" Rail - Black Chambered in .300 Blackout (7.62x35) 16" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost Firearms 11"Sale: $239.00MSRP: $299.00 -
On Sale
Grid Defense 7.5" .300 Blackout Upper Receiver - Tungsten Gray
Sale: $299.00MSRP: $379.00Grid Defense 7.5" .300 Blackout Upper Receiver Finished in Tungsten Gray Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok...Sale: $299.00MSRP: $379.00 -
On Sale
ALWAYS ARMED 10.5" 7.62X39 UPPER RECEIVER - BAZOOKA GREEN
Sale: $209.00MSRP: $299.00Always Armed 10.5" 7.62X39 Upper Receiver - Bazooka Green Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 10.5" 1:10 Twist 4150 Barrel with Black Nitride Finish...Sale: $209.00MSRP: $299.00