Have a colt 22 conversion unit.It was probably made in the 70 or 80"s.Model # on the box is 3150.Having a problem,missfires almost every other round.It will fire the missfired round on the second hit.I checked the firing pin and noticed that the tip is sort of squared off and not round like the other firing pins in my other colts.Is this normal for the pins in the conversion unit ?
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