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Firearms Training

Single and Double Action

By + John P. Silvaggio

The main difference between a single action and a double action is how the trigger is cocked.
  1. Single-action - the trigger performs one action; releasing the hammer. The hammer must be manually cocked with the thumb.
  2. Double-action - the trigger performs two tasks; it both cocks and releases the hammer. Most double-action revolvers can also be fired in a single-action mode by cocking the hammer with the thumb