Quote Originally Posted by TooSixy View Post

Your KH comes with the old-style Catch so you will need the old-style Match hammer (without the notch on the right side). Or buy the 219442 Catch and the new-style Hammer.

Difference between regular and Match hammers can be found on here if you search for it. There must be at least a couple of threads about it. Basically, the radius is more polished and the cut on the bottom of the Match hammer (where it contacts the sear) is shallower.
Thanks for that. I spent hours and hours browsing here, reading threads, linking threads. Once I thought I got to the point I "almost" understood, I actually registered and asked the follow up question to make sure I actually DID. There is an ungodly amount of information here to sort through, read, digest and understand. I don't think in 20 years I could read it all!