I own and carry all three types of J frames, steel (60-3), light weight (642), and air-weight (342). Have had the 60 since 1988 and have thousands of rounds through it. Have had the 342 no-lock since 2001 and have at least 1500 rounds through that one. Only used the 642 about four years with 400-500 rounds through it. Only crack in any was a crack in the yoke barrel of the 342, which the factory fixed and returned very rapidly.