Smith & Wesson 163606 Model 629 44 Rem Mag or 44 S&W Spl Stainless Steel 6″ Barrel & 6rd Cylinder, Satin Stainless Steel N-Frame, Red Ramp Front/White Outline Rear Sights

The LM-ERDS (LaserMax-Enclosed Red Dot Sight) is a robust fully enclosed sight for mourning on RMR or MOS optics ready pistols. the housing is constructed of aircraft grade 7071 aluminum. The LM-ERDS comes equipped with an industry first external forward-facing light sensor which automatically adjust the brightness of the red dot based on ambient lighting conditions. A RMR and Glock MOS mounting base plates are included. IPX7 waterproof.