Does anyone know for sure if the newer cylinder release thumb latch
can be retrofitted to 90's-era j-frames with the older latch?
Asking, because: infamous thumb knuckle cuts and blood on the hump of my new-to-me 640 centennial with +P shooting. Sort of getting old, considering that I don't have the same issue with my 642.
Can I just buy a newer latch and pop it on?
Thanks in advance, folks.