I beg to differ- at least on the Model 12 side- and the Model 97 as well- never have owned a Model 42, or for that matter, any shotgun in .410 bore-- Model 12's never really wear out- I seldom dis-assemble mine, and transport them to area farms and hunting spots in full length Boyt cases-- but their interrupted thread design is hard to find any fault with- almost impossible to cross-thread, and the take up adjustment is flawless- can't speak for the Remington 17 and Ithaca 37, also the Remington 31, as to the longevity of their take-down threaded designs-but I am sure they compare favorably with that of the Model 12--
