I believe that Jack started making replicas of early American flintlock rifles, don’t remember which styles and moved on to modern custom rifles and as has been mentioned, he did it all. Actually Cole is Jacks son and Frank must be the grandson.
Never have talked to Frank, but a number of times with Cole. Last time, a few years ago I’d called him to compliment him on a stock fitting and checkering job he’d done for me and he indicated his son had done the checkering, but didn’t mention the sons name. I think there are some prior threads on this site that mention both Jack and Cole and the quality of their workmanship!