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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Out of stockOn Sale
Ghost Vital 7.5" .300 Blackout Pistol Kit
Sale: $419.00MSRP: $479.00Ghost 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 5/8 by 24...Sale: $419.00MSRP: $479.00 -
On Sale
Ghost Firearms Elite 7.5" Upper .300 Blackout - OD Green
Sale: $259.00MSRP: $329.00Ghost Firearms Elite 7.5".300 Upper - OD Green OD Green Cerakote Finished Chambered in .300 Blackout (7.62x35) A2 Flash Hider 7.5" 1:8 Twist 4150 Light HBar Barrel Black NitrideSale: $259.00MSRP: $329.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Burnt Bronze Made in the USA Chambered in .300 Blackout (7.62x35) Dimpled Flash Can Pistol Length Gas System 9" Grid Defense Octagon M-Lok...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - OD Green
Sale: $329.00MSRP: $399.00Grid Defense OD Green 7.5" 5.56 Flash Can Upper Finished in Magpul Olive Drab Green Cerakote 7075-T6 Mil Spec 5.56 Upper Receiver Chambered in 5.56x45 NATO 1:7 Twist 7.5" 4150 M4 Barrel - Black...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Vital 10.5" .300 Blackout Pistol Kit
Sale: $419.00MSRP: $479.00Ghost Firearms Vital 10.5" .300 Blackout Pistol Kit Chambered in .300 Blackout (7.62x35) A2 Birdcage Flash Hider 10.5" 1:8 Twist 4150 Light HBar Barrel Black Nitride Pistol Length Gas System Ghost...Sale: $419.00MSRP: $479.00 -
On Sale
ALWAYS ARMED 16" 300 BLACKOUT UPPER RECEIVER - BURNT BRONZE
Sale: $219.00MSRP: $319.00Always Armed 16" 300 Blackout Upper Receiver - Burnt Bronze Made in the USA Mil-Spec 7075 T6 16" Upper Receiver with Dust Cover and Forward Assist 16" 1:8 Twist 4150 Barrel with Black Nitride...Sale: $219.00MSRP: $319.00 -
Ghost IHS 5" Upper 5.56 Nato
$239.00 - $259.00Ghost IHS 5" 5.56 Upper Hard Coat Black Anodized Finish Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 5" 1:5 Twist 4150 Chrome Moly Vanadium Barrel 1/2x28 Thread Pitch Micro Le$239.00 - $259.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - MAGPUL FDE
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout 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 Nitride Finish...Sale: $209.00MSRP: $299.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" STAINLESS STEEL 9MM TR SERIES UPPER RECEIVER - BLACK
Sale: $179.00MSRP: $299.00ALWAYS ARMED 7.5" STAINLESS STEEL 9MM TR SERIES UPPER RECEIVER - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver 7" TR Series MLOK Hand Guard 7.5" 1:10 Twist 416R Stainless Steel Barrel...Sale: $179.00MSRP: $299.00 -
On Sale
Grid Defense 16" 5.56 Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Upper Receiver - Tungsten Gray Tungsten Gray Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash...Sale: $329.00MSRP: $399.00 -
On Sale
Ghost Firearms Elite 16" Upper 9MM - Blue Titanium
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" Upper 9MM - Blue Titanium Blue Titanium Finished Chambered in 9x19 Para A2 Flash Hider 1/2x36 Thread Pattern 16" 1:10 Twist 4150 Light HBar Barrel Black NitrideSale: $269.00MSRP: $349.00 -
On Sale
ALWAYS ARMED 7.5" 300 BLACKOUT UPPER RECEIVER - SMITH & WESSON RED
Sale: $209.00MSRP: $299.00Always Armed 7.5" 300 Blackout Upper Receiver - Smith & Wesson Red 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...Sale: $209.00MSRP: $299.00 -
On Sale
Grid Defense 10.5" 5.56 Upper Receiver - FDE
Sale: $299.00MSRP: $379.00Grid Defense 10.5" 5.56 Upper Receiver Finished in Magpul Flat Dark Earth Cerakote Chambered in 5.56x45 NATO 7075-T6 Milspec Upper Receiver 10.5" 1:7 Twist 4150 Steel M4 Barrel - Black...Sale: $299.00MSRP: $379.00 -
On Sale
Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 7.5" .300 Blackout Flash Can Upper Receiver Finished in Tungsten Gray Cerakote Mil-spec 7075-T6 Upper Receiver 7.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride 9" Octagon M-Lok...Sale: $329.00MSRP: $399.00 -
Ghost IHS 5" Upper .300 Blackout
$219.00 - $239.00Ghost IHS 5" .300 Blackout Upper Receiver Hard Coat Black Anodized Finish Chambered in .300 Blackout A2 Flash Hider 5" 1:5 Twist 4150 Chrome Moly Vanadium Barrel 5/8x24 Thread Pitch M$219.00 - $239.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 300 BLACKOUT BX SERIES UPPER RECEIVER - BLACK ANODIZED
Sale: $189.00MSRP: $269.00ALWAYS ARMED 7.5" 300 BLACKOUT BX 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...Sale: $189.00MSRP: $269.00 -
Out of stock
Always Armed 10.5" .300 Blackout Upper Receiver with Stainless Steel Barrel and 7" M-Lok Hand Guard
$289.00Always Armed 10.5" .300 Blackout Upper Receiver with Stainless Steel Barrel and 7" M-Lok Hand Guard Hard Coat Black Anodized Finish Chambered in .300 Blackout (7.62x35) A2 Flash Hider 10.5" 1:8...$289.00 -
Out of stockOn Sale
GHOST ELITE 16" UPPER 5.56 NATO - TACTICAL GRAPE
Sale: $269.00MSRP: $349.00Ghost Firearms Elite 16" 5.56 Upper - Tactical Grape Tactical Grape Cerakote Finished Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 16" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length...Sale: $269.00MSRP: $349.00 -
On Sale
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Tungsten Gray
Sale: $329.00MSRP: $399.00Grid Defense 7.5" 5.56 Flash Can Upper - Tungsten Gray Finished in Tungsten Gray Cerakote 7075-T6 MilSpec Upper Receiver 7.5" 1:7 Twist 4150 Barrel - Black Nitride Chambered in 5.56x45 NATO Dimpled...Sale: $329.00MSRP: $399.00 -
On Sale
Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 10.5" .300 Blackout Flash Can Upper Receiver Finished in Blue Titanium Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:8 Twist 4150 Light HBar Barrel - Black Nitride...Sale: $329.00MSRP: $399.00