The second-generation R3D night sights are engineered to give you a brighter, stronger set of sights. Easily install your sights with a set that requires 50% less force for installation. R3D 2.0 sights are built to withstand years of EDC use and abuse. The set drives focus downrange using a serrated blacked-out rear sight and a dual-illuminated tritium photoluminescent front sight. R3D 2.0 sights are the brightest notch and post option for fast and accurate shooting in bright and low light.Features :For Glock 19/17Green RingTritium front and rear sightBlack nitride surface finishDIYer Install RatedDual-Illuminated tritium photoluminescent front sightHigh contrast orange or green photoluminescent Glow DotAnti-glare Blacked-out Serrated Rear SightRear Sight Ledge for one-handed slide manipulations