Breech pin - definition of Breech pin by The Free Dictionary
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Removing the new multiple breech pin differs from the original.
Note the firing pin will need to be pushed into the breech pin with your thumb in order to replace the pin.
Use the firing pin to push out the breech pin
(#014) by pulling the barrel slightly forward and holding it there as you push.
Slide the breech pin
and toggle out towards the rear of the barrel extension (6).