Some pistols employ a Single-Action/Double-Action (SA/DA) mechanism, providing the operator the option of carrying “cocked and locked” as a typical SAO pistol, or as a traditional Double Action firearm. SA/DA semiauto pistols are typically equipped with a de-cocker lever that safely drops the hammer after the first round is chambered and the hammer is cocked. In this condition, the first pull of the trigger will be a harder, longer Double-Action pull.