The FUSION Folding Front Sight provides a low profile front iron sight option for those using the FUSION Micro Hub. When deployed, it stands at regular “F” height and is compatible with standard rear BUIS from other manufacturers. The FUSION Folding Front Sight comes with a standard off-the-shelf M4 front sight post and is fully adjustable for elevation. Note: The FUSION Folding Front Sight requires the FUSION Micro Hub for attachment to a weapon.