Apex Tactical Smith & Wesson SD Trigger Spring Kit
This drop in kit produces a smoother trigger pull and improved reset along with lowering the trigger pull weight from 8 to approximately 5.5 lbs. Specified for Duty/Carry use, this kit is the perfect compliment to any Smith & Wesson SD pistol. For use in the S&W; SD line of pistols (i.e. SD9, SD40, SD9VE & SD40VE)*  SD Spring Kit Install Video Kit contains (1 each): Apex Trigger Return Spring Apex Striker Block Spring Apex Striker Spring Apex SD Slave pin (to assist installation of TRS)  *Not for use in the Sigma Series pistols. If your gun is a SW9VE or SW40VE, this kit will not work in your gun.