I appreciate APEX's efforts to help users improve their guns, but their trigger return and main striker springs left my sd9ve with a vague trigger stroke with some grittiness, and less than crisp release. With the OEM springs in those positions, and an APEX spring for the striker block only, my gun has a 6.5# trigger pull averaged over 12 pulls with a very crisp release. As I posted previously, thorough polishing of the mechanism using only the original S&W springs had dropped the pulls from 7.5 to 6.8#. Total trigger travel remains 0.41 inch. FWIW.