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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Grid Defense 16" 5.56 Upper Receiver - Pink Champagne
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 AR-15 Upper Receiver - Pink Champagne Pink Champagne Cerakote Finish Pink Champagne Complete Upper Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider...Sale: $329.00MSRP: $399.00 -
Grid Defense 18" 350 Legend Upper Receiver - Tungsten Gray
Sale: $339.00MSRP: $419.00Grid Defense 18" 350 Legend Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in 350 Legend A2 Flash Hider 18" 1:16 Twist 4150 Barrel - Black Nitride Carbine Length Gas System Grid Defense 18" M-Lok Free Float Hand Guard Grid...Sale: $339.00MSRP: $419.00 -
Grid Defense 20" .308 Winchester Billet Upper - Black
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - Black DPMS Pattern upper 20" 4150 Chrome Moly Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern Axe Brake Muzzle Device 15" M-LOK Free Floating Rail Black Anodized FinishSale: $449.00MSRP: $589.00 -
Grid Defense 20" .308 Winchester Billet Upper - Tungsten Gray
Sale: $449.00MSRP: $589.00Grid Defense 20" .308 Upper Receiver - Tungsten Gray DPMS Pattern upper 20" 4150 Chrome Moly Barrel Rifle Gas System Chambered in .308 Winchester 1:10 Twist Rate 5/8x24 Thread Pattern Axe Brake Muzzle Device 15" M-LOK Free Floating Rail Finished in...Sale: $449.00MSRP: $589.00 -
Grid Defense 20" 350 Legend Upper Receiver - FDE
Sale: $349.00MSRP: $419.00Grid Defense 20" 350 Legend Upper Receiver - Flat Dark Earth FDE Cerakote Finish Chambered in 350 Legend A2 Flash Hider 20" 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 -
Grid Defense 7.5" 5.56 Upper Receiver - Tequila Sunrise
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 5.56 Upper Receiver - Tequila Sunrise Mil-Spec Dust Cover and Forward Assist Finished in Tequila Sunrise Cerakote Mil Spec 7075-T6 Upper Receiver 7.5" 4150 M4 Barrel - Black Nitride 1:7 Twist Rate 1/2x28 TPI Thread Pitch 7" Grid...Sale: $299.00MSRP: $379.00 -
Grid Defense 7.5" 7.62x39 Upper Receiver - Blue Titanium
Sale: $299.00MSRP: $379.00Grid Defense 7.5" 7.62x39 Upper Receiver - Blue Titanium Made in The USA Mil Spec 7075-T6 Upper Receiver 7.5" 1:10 Twist 4150 Light HBAR Barrel - Black Nitride 7" Grid Defense Octagon M-Lok Rail Pistol Length Gas System A2 Flash Hider Chambered in 7...Sale: $299.00MSRP: $379.00 -
Grid Defense Stainless Steel 10.5" .300 Blackout Upper Receiver - Tungsten Gray
$399.00Grid Defense 10.5" .300 Blackout Upper Receiver Finished in Tungsten Gray Cerakote Mil-Spec 7075-T6 Upper Receiver 10.5" 1:8 Twist 416R Stainless Steel Barrel Chambered in .300 Blackout (7.62x35) A2 Muzzle Device Pistol Length Gas System 9" Grid Defense...$399.00 -
Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver - Blue Titanium
$399.00Grid Defense Stainless Steel 7.5" .300 Blackout Upper Receiver Blue Titanium 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 Grid...$399.00 -
Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver - Tactical Grape
$399.00Grid Defense Stainless Steel 7.5" 5.56 Upper Receiver Purple 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 Hand...$399.00 -
.22LR CONVERSION KIT - 4.5" BARREL, .22 BOLT CARRIER, CMMG .22 CHARGING HANDLE, AND 25 ROUND MAGAZINE
$329.00.22LR CONVERSION KIT - 4.5" BARREL, .22 BOLT CARRIER, CMMG .22 CHARGING HANDLE, AND 25 ROUND MAGAZINE CMMG .22LR POLYMER CHARGING HANDLE Anti-Jam Design Only Compatible with .22LR Upper Receivers Mil-Spec Style Lightweight and Durable Polymer...$329.00 -
.308 Winchester 18" Barrel and Bolt Carrier Group Combo
$368.00Ghost .308 Bolt Carrier Group Made in the USA Compatible with DPMS Style AR10 .308 9310 Bolt 8620 Steel Carrier Salt Bath Nitride Finish Ghost 18" AR-10 .308 Barrel 4150 Chromoly Steel Light SOCOM Profile M4 Feed Ramps .308...$368.00 -
ALWAYS ARMED 16" 5.56 MAKO UPPER RECEIVER - MULTICAM GRAY
$319.00ALWAYS ARMED 16" 5.56 MAKO UPPER RECEIVER 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 .750 Low Profile Gas...$319.00 -
ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - SIG PINK
Sale: $269.00MSRP: $349.00ALWAYS ARMED 16" 9MM STAINLESS STEEL UPPER RECEIVER - SIG PINK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para A2 Flash Hider 15" Free Float M-LOK...Sale: $269.00MSRP: $349.00 -
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BURNT BRONZE
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - BURNT BROZE Chambered in .22LR Finished in Burnt Bronze Cerakote 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...Sale: $239.00MSRP: $359.00 -
ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - FDE
Sale: $239.00MSRP: $359.00ALWAYS ARMED 4.5" .22LR TRX SERIES UPPER RECEIVER - FDE Chambered in .22LR Finished in FDE Cerakote 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 Series...Sale: $239.00MSRP: $359.00 -
ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - BURNT BRONZE
Sale: $424.00MSRP: $599.00ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - BURNT BRONZE Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para Flash Can Muzzle Device 7.25" Free Float...Sale: $424.00MSRP: $599.00 -
ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - FDE
Sale: $424.00MSRP: $599.00ALWAYS ARMED 5.5" 9MM OCTO SERIES FLASH CAN PISTOL KIT - FDE Made in the USA Mil-Spec Lower Parts Kit 1/2 x 36 Thread Pitch 5.5" 1:10 Twist 416R Stainless Steel Barrel Chambered in 9X19 Para Flash Can Muzzle Device 7.25" Free Float M-LOK Hand...Sale: $424.00MSRP: $599.00 -
ALWAYS ARMED JESTER 16" 7.62x39 RIFLE KIT - BURNT BRONZE
Sale: $463.00MSRP: $509.00Always Armed Jester 16" 7.62x39 Rifle Kit - Burnt Bronze 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 Carbine Length Gas Tube .750 Bore Gas Block Chambered...Sale: $463.00MSRP: $509.00 -
ALWAYS ARMED JESTER 16" 7.62x39 RIFLE KIT - FDE
Sale: $463.00MSRP: $529.00Always Armed Jester 16" 7.62x39 Rifle Kit - FDE 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 Low Profile...Sale: $463.00MSRP: $529.00