DXW2 Big Dot Features XS Sight DXW2 Big Dot Sight for Ruger 1911 Target - Yellow DXW2 Big Dot Specifications Tritium powered front sight Big Dot front measures 0.188 High-contrast colored front sight Glow dot absorbs ambient light and glows in low light Low-profile V rear provides greater visibility of front sight Simple dot-the-i sight picture Rear sight white stripe non-tritium Rear sight ledge for one-handed slide manipulations Durable CNC machined steel 10 Year Warranty 30 Day Satisfaction Guarantee Fits standard holster options