Part #213; shown with the tapered end forward (towards the firing pin), and the slot down.
I tried a long time to put it back as shown in the pic, but just couldn't make it happen. It went together alright having the tapered end towards the back (where it gets hit by the hammer), and the slot facing up towards the top of the slide.
The wear mark on the hammer looks like it had been hitting the smaller tapered end, but I didn't pay close attention during disassembly because I had this pic to go by for putting it back together.
I tried a long time to put it back as shown in the pic, but just couldn't make it happen. It went together alright having the tapered end towards the back (where it gets hit by the hammer), and the slot facing up towards the top of the slide.
The wear mark on the hammer looks like it had been hitting the smaller tapered end, but I didn't pay close attention during disassembly because I had this pic to go by for putting it back together.