Hi-Viz replacement front sight for Smith and Wesson model 617 revolvers. Shoot better with your wheel gun with a bright Hi-Viz sight. With a square profile, sight picture acquisition time is reduced. Serrations on the rear of the sight base combine with a slightly recessed LitePipe to eliminate the halo effect common to many sights and increases the durability of the LitePipes available. Overmold resin holds the red LitePipe. Easy to install.