I have received and inspected the Baker R Grade with sing;e trigger. It functions as Drew Hause described and is the Cline Patent design. Cline's patent specifically describes the barrels firing sequentially when set on right barrel first and only the left barrel when set on left. There may be some barrel preservation and choke logic to it except that this gun is choked full and full. It does meet the main purpose of avoiding accidental recoil firing.