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Early Taurus models of both the Millennium and the 24/7 were DAO (Double Action Only)
  • DAO means that the gun will not fire unless you "set" the springs as you pull the trigger.
  • A Single Action revolver is fired when the hammer is pulled back, thus "setting" the springs and the gun is fired will little pressure on the trigger.
  • Double Action refers to when you pull the trigger without pulling the hammer back, the springs have to be "set" by that action, which means the trigger pull is long and heavy.
The 24/7 Pro and the Third Generation Millennium Pro models have a SA/DA trigger similar to most revolvers
  • When the slide is cycled as a fresh unfired cartridge is chambered, the springs are "set" and the gun will fire in the Single Action mode. Each time the gun is fired, the springs are "set" so normally you experience a SA mode each time you fire the gun.
  • However, if the cartridge does not fire, the gun resets itself (like most revolvers) to DA and the trigger can be pulled again. 90% of cartridges will fire the second time the trigger is pulled unless the primer is extremely hard.
The advantage of the SA/DA method is you do not have to manually cycle the slide to attempt to fire the cartridge again. Many semi-auto guns are actually Single Action ONLY (technically the springs are "pre-tensioned" by the action of the slide). You "set" the springs with the slide cycle and if the gun does not fire, you are required to manually cycle the slide to reset the trigger.

This FAQ was the product of the group effort of all the moderators of Taurus Armed.
 
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I prefer into a Single Action only method, it does not require a lot of efforts and time and doesn't even require a manual cycle at first. :guns:
 
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