The base is solid metal, about the same weight as the original Ruger front sight. The HiViz front sight comes with six "light pipes" in flourescent green and orange, in three different dot sizes each. They gather and concentrate ambient light and make it appear there is a LED light on your front sight. Placing that glowing orb in the rear sight notch is quick and easy.
It took me all of five minutes to install the sight. I warmed up the barrel and screw, and then used blue Loc-Tite to make sure the screw would not come undone. I will try it out against the black circle on the next range trip.