BillSWPA:
I never saw any Colt revolvers. They may have been on the Personally Owned Weapon ("POW") List but I never actually witnessed any. There were several updates to the POW list and as my time in the Bureau progressed, the list kept getting shorter. That said, as to Colts, I had the ultimate revolver accessory issued to me at one point: a 1928 U.S. Navy Overstamp Thompson Submachine gun. Somewhere, I have a copy of my personal inventory list with the Thompson on it.
Bruce