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.
-
On Sale
ALWAYS ARMED 16" 5.56 NATO BR SERIES UPPER RECEIVER
$199.00 - $219.00ALWAYS ARMED 16" 5.56 NATO BR SERIES 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...$199.00 - $219.00 -
ALWAYS ARMED 16" 5.56 NATO GEN 1 RIFLE KIT
$529.00 - $549.00Always Armed 16" 5.56 NATO Gen 1 Rifle Kit 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...$529.00 - $549.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO GEN 1 UPPER RECEIVER
$199.00 - $219.00Always Armed 16" 5.56 NATO Gen 1 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...$199.00 - $219.00 -
ALWAYS ARMED 16" 5.56 NATO Jester Series Upper Receiver
$309.00 - $329.00ALWAYS ARMED 16" 5.56 NATO Jester Series Upper Receiver Made in the USA 16" 4150 Barrel Chambered in 5.56 NATO 15" Jester Rail Free Floating MLOK Quad Rail Carbine Length Gas System .750 Ga...$309.00 - $329.00 -
ALWAYS ARMED 16" 5.56 NATO MID LENGTH GEN 1 RIFLE KIT
$529.00 - $549.00Always Armed 16" 5.56 NATO Mid Length Gen 1 Rifle Kit 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...$529.00 - $549.00 -
ALWAYS ARMED 16" 5.56 NATO PENCIL BARREL GEN 1 RIFLE KIT
$529.00 - $549.00Always Armed 16" 5.56 NATO Pencil Barrel Gen 1 Rifle Kit 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...$529.00 - $549.00 -
ALWAYS ARMED 16" 5.56 NATO QUAD RAIL RIFLE KIT
$549.00 - $569.00Always Armed 16" 5.56 NATO Quad Rail Rifle Kit Made in the USA 16" 4150 Black Nitride Barrel 1:7 Twist Rate Chambered in 5.56 NATO 15" Quad Rail Free Floating MLOK Quad Rail Hard Coat Black Anodized...$549.00 - $569.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO QUAD RAIL UPPER RECEIVER
$209.00 - $229.00Always Armed 16" 5.56 NATO Quad Rail Upper Receiver Made in the USA 16" 4150 Black Nitride Barrel 1:7 Twist Rate Chambered in 5.56 NATO 15" Quad Rail Free Floating MLOK Quad Rail Hard Coat Black...$209.00 - $229.00 -
ALWAYS ARMED 16" 5.56 NATO TR SERIES RIFLE KIT
$529.00 - $549.00Always Armed 16" 5.56 NATO TR Series Rifle Kit 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...$529.00 - $549.00 -
On Sale
ALWAYS ARMED 16" 5.56 NATO TR SERIES UPPER RECEIVER
$199.00 - $219.00ALWAYS ARMED 16" 5.56 NATO TR SERIES 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...$199.00 - $219.00 -
ALWAYS ARMED 16" 9MM UPPER RECEIVER - FDE
$319.00Always Armed 16" 9MM Upper Receiver - FDE Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 1/2 x 36 Thread Pattern 16" 1:10 Twist 4150 Barrel with Black Nitride...$319.00 -
ALWAYS ARMED 5" 5.56 NATO GEN 1 IHS UPPER RECEIVER
$299.00Build the ultimate ultra-compact AR-15 pistol with the Always Armed 5" 5.56 Gen 1 IHS Upper Receiver. Engineered for extreme maneuverability and close-quarters performance, this complete upper...$299.00 -
ALWAYS ARMED 5.5" 9MM GEN 1 IHS UPPER RECEIVER
$299.00Engineered for close-quarters reliability and maximum maneuverability, the Always Armed 5.5" 9mm Gen 1 IHS Upper Receiver delivers top-tier performance for compact Pistol Caliber Carbine (PCC) builds...$299.00 -
ALWAYS ARMED 5.5" 9MM STAINLESS STEEL GEN 1 IHS UPPER RECEIVER
$299.00Build the ultimate compact PCC (Pistol Caliber Carbine) with the Always Armed 5.5" Stainless Steel 9mm Gen 1 IHS Upper Receiver. Designed for maximum maneuverability, lightweight balance, and extreme...$299.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO BR SERIES UPPER RECEIVER
Sale: $189.00MSRP: $289.00Always Armed 7.5" 5.56 NATO BR Series 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...Sale: $189.00MSRP: $289.00 -
ALWAYS ARMED 7.5" 5.56 NATO GEN 1 PISTOL KIT
$509.00 - $529.00Always Armed 7.5" 5.56 NATO Gen 1 Pistol Kit 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...$509.00 - $529.00 -
On Sale
ALWAYS ARMED 7.5" 5.56 NATO GEN 1 UPPER RECEIVER
$189.00 - $209.00Always Armed 7.5" 5.56 NATO Gen 1 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...$189.00 - $209.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 5.56 NATO OCTO SERIES UPPER RECEIVER
$199.00 - $219.00Always Armed 7.5" 5.56 NATO OCTO Series 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...$199.00 - $219.00 -
Out of stockOn Sale
ALWAYS ARMED 7.5" 5.56 NATO TR SERIES UPPER RECEIVER
$189.00 - $209.00Always Armed 7.5" 5.56 NATO TR Series 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...$189.00 - $209.00 -
Always Armed Gen 1 10.5" 5.56 Upper Receiver Without Forward Assist
$309.00Build a streamlined, ultra-compact firearm setup with the Always Armed Gen 1 10.5" 5.56 Upper Receiver Without Forward Assist. Designed for low-profile tactical builds, AR pistols, and short-barreled...$309.00