PERFECT DOT TRITIUM NIGHT SIGHTS FOR SMITH & WESSONA(R) The Tritium front dots on Night Fision's Perfect Dot night sights for Smith & Wesson M&PA(R) pistols are 30% than standard dots. That translates to 30% BRIGHTER front sights! Contrasted against the plain black rear sight, that bright front dot encourages a fast, instinctive "Front Sight Focus" that helps you keep your eyes on the target. The Tritium insert isn't surrounded by the typical painted-on ring, but rather one made of a daylight fluorescing material that produces optimum visibility in daylight. The result is what the Night Fision folks have dubbed the "Perfect Dot". Pro Mfg: Night Fision