Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Tungsten Gray

Grid Defense Complete Upper Receiver 5.56mm 10.5 inch Carbine Length 4150 Steel M4 Barrel 1-7 Twist A2 Flash Hider Tungsten Gray. 56 Upper Receiver. Grid Defense constructed these Mil-Spec AR15 Upper Receivers from 7075 T6 aluminum for a durable structure at a lighter weight. Every Grid Defense 5.56x45mm NATO Upper Receiver comes with an M-LOK free float handguard that accepts compatible accessories and doesn't interfere with your barrel. Craft a top-shelf weapon with the help of this Grid Defen