That would be the little hook that gets in the way of removing the striker fire assembly when i was trying to do the spring work earlier. Its a pain in the but to get around without bending it.

I must be oiling a little too heavy because when i pulled my striker fire assembly out there was a little oil behind it where i could not see with the assembly installed. Is that normal? I am very cautious usually when i oil and i only use the smallest drop of my M-Pro 7 i can try.

Still curious as to how it got down in there when i am so sparing with it.