Activation is by way of an ambidextrous button, essentially a polymer dowel that when centered is in the “Off” position and when pushed right or left completes the circuit to power the unit. Once activated, the red laser operates in a constant-on mode. The sight is adjustable for windage and elevation using the included 0.05-inch hex wrench.
Manipulation feels natural with the trigger finger easily extending to reach the activation button. Additionally, the stippling on the front and rear of the housing unit mimics the iconic M&P pattern, giving the gun and laser a cohesive look, as well as providing a little bit of additional purchase during use. Price: $129.