The Apex kit does make a noticeable difference. I have a 442 with the main spring and rebound spring and no failures to fire after many hundreds of rounds. I didn't change the firing pin or firing pin spring.

If you gun has been worked on by a good gunsmith, you shouldn't need to change the springs.

Regarding prosecuting attorneys and plaintiff's attorneys, it is their job to make you look like a foaming at the mouth, stone cold killer no matter what gun you use. If you're not expecting and prepared for that, then leave your gun at home!

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Centennial Every Day