I just bought a lightly-used (2020) P-01 and the seller included a brand new uninstalled MCARBO spring kit still in the unopened shipping package. When I opened the package pleasantly surprised to see that it also included a SS recoil rod. Stopped at the range on my way home to shoot a couple mags, but first I went ahead and replaced the guide rod only, keeping the factory flat spring. Worked just fine for the 3-4 mags I shot. (just range ammo 115g FMJ).
Next step is to install the spring kit (my first time going beyond a field strip of a handgun). The one spring I think I'll leave alone (at least for now) is the sear spring.
Love the P-01. I've had one before and the trigger didn't meet my expectations, but before I knew enough about improving it I found a trade for a 92fs Compact. That's when I learned just how much I preferred the P-01 ergo. So I've sold the 92fs and now I have a 2020 production P-01 which has (slightly) improved factory sights and now 15-round mags with modernized base pads. Not the most cost effective route, but glad to get back to a P-01.
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