I believe it was sent back for this barrel set, the second one fitted to it, after "vent ribs" became available. AIR, Francis once told me that the first barrel set was 30" and that he had gotten Brad Bachelder to refit it to another Smith gun he had. I wish there had been some way for me to acquire that first barrel set and have it refitted to it's original action, but that's water over the dam.

May God bless America and those who defend her.