The TS01 will not work with the Millennium Pro variation pistols with the dovetail front sight Three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights Each lamp is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture Contained within aluminum cylinders for additional protection Lamps are mounted on silicon rubber cushions to withstand shock and heavy recoil Used for PT models 111, 132, 138, 140 & 145