The Pistol Competition Kit for Ruger MK IV with Black Flat Trigger combines the Accurizing Kit for the Ruger MK IV pistol with the Bolt Tune-Up Kit for MKII, MKIII, MK IV, and 22/45.
The kit is designed to produce a trigger pull of approximately 1.75 lb with the 19.22 Flat Trigger. It is also designed to eliminate stovepipes and failures to fire.
This kit fits all variations of the Ruger MK IV (including 22/45 and 22/45 Lite). It is designed for Ruger frames; compatibility with aftermarket frames cannot be guaranteed.
The flat trigger is not compatible with MKII pistols.