Glockworx (Zev Tech) Standard Complete Drop-in Competition Trigger Kit for Gen4 40S&W/357Sig Glock pistols.  (# ZT-STD-C-4G40-Competition). I used this trigger kit  for less than 100 rounds. Trigger pull weight with the reduced power striker spring is a smooth 4 pounds. Includes: ZT standard trigger with overtravel stop, ZT race connector, adjustable over-travel stop, reduced power and standard power striker springs, ZT trigger spring, ZT titanium firing pin safety, reduced power firing pin safety spring, and allen wrench to adjust over travel. There are no instuctions that came with it. $100. shipped. PM me here or email to RMZ1@yahoo.com.