Kahr MK9 or PM9 recoil spring/guide rod
Seems I've read where Kahr recommends replacing the recoil spring on their pistols (at least the MK9) every 3000 rounds. The guide rod (plastic?) has been topic for much discussion along with the entire recoil spring assembly. Here's the questions:
What material is used for the MK9 guide rod? Why does Kahr offer a stainless steel guide rod? What would a SS guide rod do for the performance of the pistol? What about SS guide from a cosmetic standpoint?
You can buy a recoil spring assembly from Kahr for 14 bucks which appears to include the guide rod (plastic?)...or you can buy a SS guide rod for 41 bucks but it doesn't appear to include the recoil spring. What's up with that? So, I buy a SS guide rod from Kahr Online Shop for my KM9...how easily will I be able to install it and new recoil spring(s) and will it fit properly? Wolff offers some replacement parts (not sure if it's SS guide with springs...or without springs) and I'm wondering if Wolff is the better way to go.