The Apex Polymer Action Enhancement Trigger Kit directly replaces the factory hinged trigger with a solid body polymer trigger with a center mounted pivoting safety. The rounded face of the trigger provides a smooth, comfortable surface for the shooter's finger while firing. 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. The reduced power trigger spring kits can be special ordered. Use item 000-002-152 for Sigma. Mfg: Apex Tactical Specialties Inc