[kx592]

I need to find someone on here who has experience taking apart a 590a1 trigger group. I was cleaning my gun the other day, did the barrel bolt and trigger group, leaving all pins in place and just doing what i can "reach". Put it together, ran some snap caps for insurance, it worked fine, so put it away. I noticed cleaning the room a small black spring on the ground where I was working. Its maybe 1/2" long or less and skinny. Im assuming it came from the trigger group but I cannot find any obvious spot for it to belong. I searched last night or an hour for schematics and what have you to no avail. Anyone have any ideas or need more info? Help is appreciated!