I had a stock hammer it is has been okay for About 15000 shots! And that is pretty good for a stock hammer, i think going through manny reviews, maybe a lucky hammer.
My firing pin broke first, i could get an new one from hepheastus, it was a drop in. Then the hammer spring broke, i had some springsteel and made my own. Recently i did some maintenance on my AK and when i polished the hammer i found a tiny crack, barly visable close to the mounting axle. Better replace while it stillworks.
I have been searching for a replacement and ended up in Hongkong for a steel WE made hammer. I will