Hello, I have about 2000 rounds in my Springfield Operator. I dissassembled it after the last time at the range and found out that the firing pin spring was broken in two places. I ordered a new spring kit from Wilson Combat (316G) and installed everything except the mainspring. I could NOT get it to fit. I was also having an issue with the hammer falling to half-cock when the slide was released. I called Wilson and they said to check the sear spring again and that the mainspring WILL work, even though it's longer, and it's just really tough to get in. Well I got it in using some channel locks, and it worked, but the hammer would not cock after that. I ended up putting the old spring back in, but I am still having an issue with the hammer falling to half cock on slide release. I cannot understand why this spring is longer. In the mainspring housing there are two "cups" and maybe the mainspring wasn't designed for that? I don't know.. But Wilson said everything should drop in fine. Do I really even need to replace all of this? Can I just drop in the new firing pin spring and leave it be? I am iffy about my gun now and don't trust it 100%. I plan on hitting the range again once I work out these little details and break it in and be comfortable again with it. It has never failed me before, even with a broken firing pin spring.