This is a Crimson Trace Corporation Laserguard known as the Laserguard, model LG-454.
The LG-454 Laserguard(R) is a red laser sight designed specifically for Smith & Wesson's M&P Bodyguard .380. The laser is user-installed in moments and fully adjustable for windage and elevation. The product is activated using a front activation button featuring Crimson Trace's famed Instinctive Activation(TM) which activates the laser when the firearm is held in a natural firing grip.
Features:
Front activation
Red laser
Factory sighted at 50Ft
.5 inch diameter at 50 feet