I have one Uberti which had the 3 click hammer, never had trouble with misfiring, but did not like the amount of overtravel the trigger had once the sear released.......you could feel the sear release, though I pulled through, my youngest was constantly have misfiring problems, and it was easily duplicated by stopping the trigger pull after you felt the sear release.......changed out with standard old style parts, upside is no worries about light strikes, and an improved trigger pull.
so many keep blaming Uberti for imposing this safety on us.......it was not Uberti's idea, nor any lawyers, we can thank the politicians for this as to be able to import a revolver, it has to have a safety that will pass the ATF drop test to be approved for importation. Uberti used to make a safety hammer with the pivoting block on it, activated by putting the hammer on the safety notch....this had several moving parts and was/is prone to having a failure that allows the block to 'free float' and it drops and does it's job by not letting the gun fire until it is repaired or removed........the newer safety is actually a simplier approach and the hammer doesn't have any visible contraption on it like the old one.........now, the old model hammer is approved for importation because of it using the old Hammerli Virginian "Swiss Safe", which is a long base pin rod with 2 positions, one which acts as a safety. Other markets may also require the safety hammer, and the ones sold by Stoeger (Beretta owned) all have the safety hammers.....the importers, Taylors, Cimarron, etc. could simply specify only the four click hammer/base pin be used.....as the MP line from Cimarron was at one time, but this probably would cost a bit more.....which would raise the price, besides they make more $$$ by selling you the gun, then selling you the "upgrade" parts.