The complete drop-in kit comes complete with the Volquartsen Target Hammer, Hammer Bushing, Target Sear, Target Trigger with plunger and spring. It also comes with pretravel and overtravel adjustments.
The Accurizing Kit for the Ruger MK IV will provide a crisp, clean 2.5lb trigger pull. This kit will eliminate the magazine disconnect.
The kit is available now for a cost of $105 from Volquartsen.