This is a cz457 action. Trigger has yo Dave spring kit. Maxwell has extended release. Bolt has yo Dave spring kit and .002 bolt shim installed. Has lijla barrel installed and ceracoated. . Shoots extremely well and shoots many different ammos very well. The targets were shot today ( 8-16'25) at 59 yards by me to show how differentammo shot. It was pretty windy but still good results. The eley match black box was best. The first 3 5 shots groups were .22 inch average . The forth group i messed up the one shot but it was me not ammo or gun. This thing shoots many different ammos very well. .