AR15 - 5.56 NATO
Get the best performance from your AR-15 with our 5.56 NATO components from Grid Defense today. Our high-quality components are designed to provide exceptional performance and reliability, ensuring that you can shoot with confidence every time. Explore our selection of AR-15 5.56 NATO parts and start building your dream rifle today.
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Grid Defense 10.5" 5.56 Flash Can Upper Receiver - Blue Titanium
Sale: $329.00MSRP: $399.00Grid Defense 10.5" 5.56 Flash Can Upper Receiver Finished in Blue Titanium Cerakote Made in the USA 7075-T6 Mil-Spec Upper Receiver 10.5" 1:7 Twist 4150 M4 Profile Barrel - Black Nitride Chambered in 5.56x45 NATO Carbine Length Gas System .750 Low...Sale: $329.00MSRP: $399.00 -
GHOST ELITE 16" UPPER 5.56 NATO - ZOMBIE GREEN
Sale: $269.00MSRP: $349.00GHOST ELITE 16" UPPER 5.56 NATO - ZOMBIE GREEN Zombie Green Cerakote Finished Chambered in 5.56x45 NATO (5.56/.223) A2 Flash Hider 16" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 14"...Sale: $269.00MSRP: $349.00 -
ALWAYS ARMED 7.5" 5.56 NATO PISTOL KIT - BLACK
Sale: $339.00MSRP: $459.00Always Armed 7.5" 5.56 NATO Pistol Kit - 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 System .750...Sale: $339.00MSRP: $459.00 -
ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND BI-POD - BLACK
$369.00ALWAYS ARMED 16" 5.56 NATO STAINLESS STEEL UPPER RECEIVER WITH 12" RAIL, SIGHTS, AND BI-POD - BLACK Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 Twist 416R Stainless Steel Barrel Chambered in 5.56...$369.00 -
Ghost Vital 16" 5.56 Rifle Kit
Sale: $429.00MSRP: $499.00Ghost Firearms Vital 16" Upper A2 Birdcage Flash Hider 16" 1:7 Twist 4150 M4 Barrel Black Nitride Carbine Length Gas System Ghost Firearms 11" M-Lok Free Float Hand Guard Ghost Mil-Spec 7075 T6 Upper...Sale: $429.00MSRP: $499.00 -
ALWAYS ARMED 10.5" 5.56 NATO UPPER RECEIVER - BAZOOKA GREEN
Sale: $209.00MSRP: $299.00Always Armed 10.5" 5.56 NATO Upper Receiver - Bazooka Green 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 ...Sale: $209.00MSRP: $299.00 -
ALWAYS ARMED 7.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 9.25" MLOK RAIL - BLACK
Sale: $229.00MSRP: $299.00ALWAYS ARMED 7.5" 5.56 NATO FLASH CAN UPPER RECEIVER WITH 9.25" MLOK RAIL - BLACK Hard Coat Black Anodized Finish Mil-Spec AR15 Upper Receiver with Dust Cover and Forward Assist 9.25" Free Float M-LOK Rail 7.5" 1:7 Twist 4150 Barrel with Black Nitride...Sale: $229.00MSRP: $299.00 -
ALWAYS ARMED 16" 5.56 NATO RIFLE KIT - SIG PINK
Sale: $379.00MSRP: $529.00Always Armed 16" 5.56 NATO Rifle Kit - Sig Pink Made in the USA Mil-Spec 7075 T6 Upper Receiver with Dust Cover and Forward Assist 16" 1:7 or 1:8 Twist 4150 Barrel with Black Nitride Finish Chambered in 5.56 NATO Carbine Length Gas System ...Sale: $379.00MSRP: $529.00 -
Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 7.5" 5.56 Flash Can Upper Receiver - Burnt Bronze Finished in Burnt Bronze Cerakote 5.56 Flash Can Upper Receiver Mil Spec 7075-T6 Upper Receiver 7.5" 1:7 Twist 4150 M4 Barrel - Black Nitride 9" Grid Defense Octagon M-Lok Rail Pistol Length...Sale: $329.00MSRP: $399.00 -
7.5" 5.56mm with 7" M-Lok Pistol Kit Blue Titanium
Sale: $439.00MSRP: $579.00Ghost Firearms 7.5" 5.56 Pistol Kit - Blue Titanium Blue Titanium Cerakote Finished Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 7.5" 1:7 Twist 4150 Chrome Moly Steel Barrel Black...Sale: $439.00MSRP: $579.00 -
Grid Defense 16" 5.56 Quad Rail Upper Receiver - Black
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 Quad Rail Upper Receiver - Black Black Anodized Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 Upper ReceiverSale: $329.00MSRP: $399.00 -
Grid Defense 16" 5.56 Quad Rail Upper Receiver - Magpul OD Green
Sale: $349.00MSRP: $399.00Grid Defense 16" 5.56 Quad Rail Upper Receiver - Magpul OD Green Magpul OD Green Cerakote Finish Chambered in 5.56x45 NATO 14" M-Lok Quad Rail 16" 1:7 4150 M4 Barrel - Black Nitride Carbine Length Gas System A2 Flash Hider Mil-Spec 7075-T6 16" Upper...Sale: $349.00MSRP: $399.00 -
10.5" 5.56mm with 9" M-Lok Pistol Kit - Tungsten Gray
Sale: $439.00MSRP: $579.00Ghost Firearms 10.5" Pistol Kit - Tungsten Gray Chambered in 5.56/.223 (5.56x45mm) M16 Bolt Carrier Group Mil-spec Charging Handle A2 Flash Hider 10.5" 1:7 or 1:8 Twist 4150 Chrome Moly Steel Barrel Black Nitride Carbine Length Gas...Sale: $439.00MSRP: $579.00 -
ALWAYS ARMED 10.5" 5.56 NATO UPPER RECEIVER - SIG PINK
Sale: $209.00MSRP: $299.00Always Armed 10.5" 5.56 NATO Upper Receiver - Sig Pink 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 .750...Sale: $209.00MSRP: $299.00 -
ALWAYS ARMED 16" UPPER RECEIVER COMBO DEAL - 5.56 NATO/.300 BLACKOUT
$558.00Always Armed 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 Carbine Length Gas System .750...$558.00 -
ALWAYS ARMED 7.5" 5.56 NATO UPPER RECEIVER - MAGPUL FDE
Sale: $209.00MSRP: $299.00Always Armed 7.5" 5.56 NATO Upper Receiver - Magpul FDE 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 System .750...Sale: $209.00MSRP: $299.00 -
GHOST FIREARMS 16" 556 WITH 14" M-LOK RAIL RIFLE KIT - TACTICAL GRAPE
Sale: $449.00MSRP: $599.00GHOST FIREARMS 16" 556 RIFLE KIT - Tactical Grape Premium products by Ghost Firearms, the new M-Lok rail rifle kit with A2 flash hider. With Mil-Spec lower parts. Finished in Purple Cerakote Chambered in 5.56 NATO 16" 1:7 Twist 4150 M4 Black...Sale: $449.00MSRP: $599.00 -
Ghost Firearms 7.5" 5.56 Flash Can Upper Receiver Pistol Kit - Black Anodized
Sale: $449.00MSRP: $599.00Ghost Firearms 7.5" Flash Can Upper Receiver Pistol Build Kit The new AR15 build kits with Mil-Spec complete upper receiver and flash can. Hard Coat Black Anodized Finish Milspec 7075-T6 Upper Receiver 7.5" 1:7 4150 M4 Barrel - Black Nitride...Sale: $449.00MSRP: $599.00 -
Grid Defense 16" 5.56 Upper Receiver - Burnt Bronze
Sale: $329.00MSRP: $399.00Grid Defense 16" 5.56 AR-15 Upper Receiver - Burnt Bronze Burnt Bronze Cerakote Finish Burnt Bronze 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 Mil-Spec...Sale: $329.00MSRP: $399.00