Williams FireSights use a small diameter fiber optic rod held in a aluminum sight base as opposed to the many plastic bases on the market. In use the red front bead is very visible even against a dark background. SPECIFICATIONS: Mfg Item Num: 71031 Category: GUN SIGHTS Type :Fixed Rear Frame Material :Metal Frame Color :Black Firearm Fit :S&W M&P Compact 22 LR Rear Color :Red