I have a old (pre QLR) TC Hawken flintlock. It came with a pretty color case hardened frizzen that wore out quickly. I called TC and they sent me a black frizzen that was worthless. Then they sent me another that was a little better. We have a Pa. Hunter that is almost as old. That frizzen is still original, and sparks just fine. Obviously, there was some variability in hardening. Finally, I fitted a Lyman frizzen to the old Hawken and it sparks great, even with the older lock geometry.

Other than that, it has been a very good shooting flintlock. Back in those days, they used really nicely figured wood in the stocks, and fitting was excellent.