Check out Lionheart Industries: http://www.lionheartindustries.com/ https://www.facebook.com/LionheartIndustries Their FB page has a diagram explaining the Double Action PLUS+ system. It sounds like a pre-loaded single and a half action where the hammer is partially cocked, making for a lighter and shorter trigger pull for the first shot if you don't want traditional DA/SA or SAO. It looks pretty interesting and at a good price for a forged steel gun. Wanna kill these ads? We can help!