Competition (Comp) plain, target style, undercut blade with protected notch. Hangs over the rear of the slide and extends sight radius for quicker, more precise sighting. Lo-Mount (LM) has an angled top surface with mitered edges that won't snag on holsters or clothes. Rebated blade fights glare. Wide Notch (WN) has enlarged, .140" notch to provide more light around the front sight for a clearer sight picture and faster target acquisition. Super Wide Notch (SWN) has .170" wide notch for even faster target acquisition; helps aging eyes see the front sight more easily. Mfg: Novak