[Mike-M]

The MINUS connector in an OEM Gen4 G17 lowers peak trigger pull by only about 0.5-lbf, to 5.0-lbf, compared to the Gen4 standard DOT connector which produces a 5.5-lbf pull.

It is unreasonable to expect a new Glock to have trigger characteristics similar to a Glock with ten thousand rounds through it.

 

[Mike-M]

... by measuring energy in the spring directly or measuring trigger pull with your old spring vs. a new one.

It requires a mathematical integration of spring force versus displacement to compute stored FP spring energy. A very easy and direct check may be done with a trigger pull gauge attached to the firing pin underlug. The force indicated when the FP underlug has been fully withdrawn with the gauge should be whatever the rated spring force is. The standard OEM SILVER FP spring should be very near 5.5-lbf.

But, I agree that OEM FP irregularity is a very rare thing. I would not worry about it, unless a slide disassembly reveals an OEM RED 6.3-lbf or BLUE 7.0-lbf FP spring, neither of which is sold by Glock for use in the North American market.