Ultradyne C4 Dynamount AR-10 Front Sight Black

Most of the time, shooters mount front sight on the picatinny rail of a free-float handguard. By definition, a free-float handguard doesn't move with the barrel. This means that when that handguard moves, the sights do to. Even properly-installed handguards move, whether it's from the weight of the firearm, a strong grip, or impact. Especially at the end, farthest from the point of attachment, and where most users mount sights. A small amount of movement can make a big difference in point of aim