The first step to do when reassembling
the bolt group is to put the firing pin back in
the bolt housing.
Start by locating the
cutout in the rear of the bolt. You can see this
cutout at about 10 o'clock in the photograph below.
Orient the firing pin
so that when it is inserted that angled metal on
the back of it will slip directly into the cutout.
As shown below, the
firing pin will slide all the way in and the rear
of the firing pin will sit flush with the back of
When the firing
pin is in position turn the bolt over and replace
the Extractor Spring and Plunger.