To index the cylinder and fire the gun, you have to manually cock the hammer with your thumb.

In a single-action-only revolver (commonly referred to as just a “single action revolver”), such as the Colt Single Action Army, the trigger performs one action - it releases the hammer. Most revolvers fall into one of three action types: Single action only (SAO) This aligns the topmost chamber - i.e., at the 12-o’clock position - with the barrel. By cocking the hammer or pressing the trigger, the revolver mechanism indexes the cylinder, rotating it one position. The revolver is a handgun that typically has a single barrel and a rotating cylinder containing multiple firing chambers.

Understanding the differences between them can help you determine what type of weapon you need for your purposes. Both originated in the 19th century - although revolver-type firearms have existed since the 16th century - and have undergone considerable development. Revolvers and semi-automatic pistols are among the most popular types of handguns in use today.

Revolv modern combat versus