OK then let's try again. First, as I've said elsewhere on THR, I'm an internet expert (believe me
). I've never had the bolt assembly on my own 99EG apart but after studying the parts diagram i came to the following conclusions:
First, although part 47 is called the hammer, the 99 action lacks a hammer in the usual sense; it is striker-fired. When cocked, the striker (47) draws back the firing pin (46) which is fixed to the striker by pin 48; and spring 45, being captured by the firing pin, is compressed. At its rear, 47 simply slides back and forth inside bushing 44. When the sear releases it, the hammer/firing pin assembly is driven forward by spring 45. This much is obvious from the drawing.
Without taking measurements I'm left to surmise that when spring 45 is
relaxed the whole 47+45+46 assembly is slightly shorter than the bolt body, so is free to slide back and forth as a unit for a short distance. Spring 44A, the retractor spring, bears against the inside of 47's 'L' to push the assembly back that short distance; it holds the assembly to the rear and so clears the firing pin from the fired primer.
So the reason you can't find a 'retractor' in the parts drawing is because there isn't one. That little spring 44A does it all.