HIVIZ Smith & Wesson 1911 Rear Sight Red - SKU: SW2109-RHiViz handgun sights have been redesigned. With an all-new square profile, sight pictureacquisition time is reduced. Serrations on the rear of the sight base combine with a slightlyrecessed LitePipe to eliminate the halo effect common to many sights and increase thedurability of the toughest LitePipes available. This new design is also more holster friendly. Fits all production model 1911 pistols; does not fit Performance Centre or DK models.