Solid Head Firing Pin
The initial 20 + thousand lifter guns had what we call "articulated " firing pins. The portion of the pin that struck the primer is off set by about 1/8 inch with respect to the portion that was struck by the hammer. The pin is about 3/32 diameter and is bushed by a screwed in brass bushing.
Around s/n 24000, the first top action gun appearred and the lifter frame was revised to the same dimensions. These lifters share the firing pin of the top action, that has the shape of a thumbtack or collar button. The firing pin is retained by a small flush screw in the frame. The large head of this firing pin seals in powder gas released by a pierced primer.
Best, Austin
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Threaded Mode