Smith & Wesson J Frame Mainspring/Hammer Spring All Models — Factory New Part 071040000 .38 special torsion spring

torsion spring

This is from the Jerry Miculek Performance Center version

The cylinder stop works in conjunction with the hand to control cylinder rotation and timing

Case hardened finish provides exceptional wear resistance and durability

Proper bolt function is absolutely critical for accuracy

Smith & Wesson J Frame Mainspring/Hammer Spring All Models — Factory New Part 071040000 .38 special torsion springSmith & Wesson J Frame Mainspring Hammer Spring All Models, Factory New OEM Part Genuine factory new Smith & Wesson OEM mainspring (hammer spring) for all J Frame revolvers. The mainspring is the powerplant of the fire control system it provides the force that drives the hammer forward to strike the firing pin and ignite the primer. A worn or weakened mainspring causes light primer strikes, misfires, and inconsistent ignition. This factory replacement