Quote:
Originally Posted by 45flaco
Hey guys. Need to lengthen an ar-10 firing pin by about 3/4" at the back. Was considering welding a bit onto it, or soldering.
Opinions?
I haven't had much luck making firing pins from bar stock, since they're so damn small, so I'd prefer to just weld or solder a bit of bar stock to the back of it.
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Soft Solder: Relatively weak alloy of Tin and Lead. Does not need "Red Heat". Does not hold very well.
Silver Solder: A.K.A. Silver Braze...not to be confused with Soft Solder consisting of Tin and small amount of Silver. Silver Solder is way stronger than Soft Solder. Uses Red Heat.
Braze: Brass based...uses Red Heat.
Welding: Strongest...the base metals are melted and flow together at higher than Red Heat (steel melts at about 2700 degrees F.)
Note: using any method listed can can negatively effect the properties of the steel firing pin.
It would be better if you would give a sketch of the firing pin with dimensions to a machinist/gunsmith and have him make and heat treat the firing pin for you.