GeorgeC said:
"...can I buy just the updated hammer and frizzen? Or do I need to buy the entire lock assembly in order to have things work propely?..."
You can buy the new style hammer assembly and new frizzen...but you can TC to fix it free under the lifetime warranty...they know they had a serious reliability problem and they redesigned the parts to make the locks work correctly.
They don't have a "recall program" as such so don't approach it from the point of view that they have some sort of free upgrade program from old style to new style...that would cost them a fortune if they announced and operated such a program...but they do seem willing to handle it as a customer satisfaction / lifetime warranty situation.
The way it always worked for me was:
1) DO NOT call and discuss it ahead of time with the "repair dept".
2) Only deal directly with the Service Manager.
3) DO NOT call the service manager ahead of time.
4) Did I mention: DO NOT contact them ahead of time?
Just priority mail the lock to his attention with a memo inside approaching it from the point of view that..."the lock is not reliabe, eats flints, can't trust it for hunting or competition, not satisfied with it, etc...would he personally see what he can do to make it 100% reliable under the lifetime warranty you paid for so you can use the rifle..."
In a half dozen cases I got locks back with all the new style parts installed at N/C...in another half dozen cases I got entire, complete new lock assemblies sent to me at N/C...others have had the same results following this approach.