The action of the Ruger SR1911 pistol is of the U.S. M1911 type that utilizes a tilting barrel design in which the barrel and slide are locked together at the moment of firing. The Ruger SR1911 pistol features a titanium firing pin and has no firing pin block, often referred to as a Series 70 design. Other safety features are a beavertail style grip safety and thumb safety. The thumb safety is extended for improved positive manipulation under all conditions. A visual inspection port permits visual inspection of the chamber to determine if the pistol is loaded. Positive extraction is facilitated by an improved internal extractor. The plunger tube for the slide stop and thumb safety is integral to the frame, not staked as in many 1911 versions, and will never come loose. The press fit link pin will also not come loose or come out.
There are three hammer positions on your Ruger SR1911 pistol: AT REST (fully forward), FULLY COCKED (fully rearward) and HALF-COCKED. The AT REST (fully forward) position is when the face of the hammer is resting on the firing pin. The pistol should never be carried or left AT REST on a loaded chamber. It should only be carried AT REST on an empty chamber. The FULLY COCKED (fully rearward) position is when the hammer is pulled all the way back to the second click point. This is the fire position and pulling the trigger when the hammer is in this position will cause the pistol to fire (assuming it is loaded). If carrying the pistol in the FULLY COCKED position, the manual safety should always be engaged. The HALF-COCKED hammer position is designed to serve as an automatic safety in the event of an unintentional hammer fall and should not be used in normal operation. If the hammer is pulled back beyond this point and inadvertently released, the hammer will drop into this position and will not contact the firing pin.