This is a Crimson Trace Corporation Laserguard, model LG-496.
The LG-496 Laserguard(R) is a compact laser sight for Springfield Armory's XD MOD.2 Series pistols. Attached firmly to the trigger guard" the laser's slim profile matches that of the pistol" and features Crimson Trace's trademark Instinctive Activation(TM). The laser sight is user-installed in minutes and is adjustable for windage and elevation.
Features:
Front activation
Red laser
Factory sighted at 50Ft
.5 inch diameter at 50 feet