This is a Crimson Trace Corporation LaserGrip known as the Lasergrips, model LG-185.
LG-185 laser sights for Taurus Small Frame revolvers features a hard polymer surface that is rugged and well suited for personal defense. The smooth feel of the polymer provides for a prompt" snag-free draw. LG-185 Lasergrips(R) includes the durability" sighting adjustments" and the defensive advantage that Crimson Trace(R) is known for.
Features:
Pressure activation
Red laser
Factory sighted at 50Ft
.5 inch diameter at 50 feet