The complete drop-in kit comes complete with CNC Machined
Disconnector, Target Hammer, Hammer Bushing, Target Sear, Sear Spring, Target Trigger
with plunger and spring. It also comes with pretravel and overtravel
The Accurizing Kit for the Ruger MK IV will provide a crisp, clean
2.5lb trigger pull. This kit will eliminate the magazine disconnect.
If your pistol says "Ruger Mark IV" anyplace this kit fits it.