Volquartsen Target Hammer w/BushingFor Ruger® Mark II, Mark III, Mark IV, 22/45- The MKII, MKIII, and MK IV Target Hammer is a complete drop-in item that is wire EDM-cut from hardened tool steel. The target hammer will not only reduce your trigger pull but will also improve lock time. Fits MKII, MKIII, MK IV, and 22/45.