38 caliber revolvers. The Beretta M9 has redundant automatic safety features to help prevent unintentional discharges. It can be fired in either double or single action mode and can be unloaded ...

They are double-action revolvers, with an exposed hammer and spur that allows for manual cocking for single-action fire, with a swing-out cylinder. Safety is provided by a transfer bar system.

The Colt single-action revolver belonged to Captain Myles Moylan, later a Medal of Honor recipient — and has an estimated ...