My no. 1 would be the cased pair of Colts presented to the Czar by A. Lincoln. They are pic'd in the Colt "dream book" No.2 would be a Winchester 73, 1 of 1000. or any weapon that could be proven to have been owned and used by Gen. Wm. T. Sherman.
A BAR would be OK also.
A BAR would be OK also.