Apex Trigger Poly. Action Enhancement S&w Sd sdve sigma Trigger Pins 6 Watt Transmit Power – 6 Watt Transmit Power – Transmits at full power to insure maximum range The dual port USB design allows user to charge up two devices at the same time while monitoring battery voltage The trigger also reduces pre travel by approximately 20% and over travel by 10% when compared to the factory trigger and is perfect for use in sd and sigma pistols already equipped with an apex sd or sigma spring kit The apex sd polymer action enhancement trigger directly replaces the factory hinged trigger with a solid body polymer trigger with a center mounted pivoting safety