I have been trying to piece together an idea of the spring weights. @
LangdonTactical has 10# and 11# springs for the PX4. LTT also says the PX4 D spring is too light for use in the 92. In a video on 92 springs, Ernest suggests the 92 gets dicey below 13#, which leads me to believe the PX4 D spring
may be in the 12# to 13# range. Ernest also says the standard 92 spring is/was 20# and the 92 D spring is 16#. Then Ernest warns that the 92 D spring is heavier than the standard PX4 spring. That suggests that the standard PX4 spring is somewhere in the 13# to 15# range.
At any rate, if anyone knows the weights of the PX4 standard and D springs, I would appreciate that info.