The revolver is a .45 caliber pistol with a 6 round magazine. It can be found in residential buildings and supermarkets. It's the third most common pistol behind the M1911 and Makarov PM, being approximately two-thirds as common as the M1911.
ArmA2 1.62 drastically reduced the damage done by the revolver. Before the update, it was able to kill zombies with one shot; after, it now takes 4 body shots.