Complex sentence: The entire action of the ZfK55 is tilted at an angle of approximately 15 degrees to provide a centered position of the telescopic sight over the receiver and stock and provide room for the unimpaired loading and ejecting cartridges with the telescopic sight mounted.
Split into simpler sentences: The entire action of the ZfK55 is tilted at an angle of approximately 15 degrees to provide a centered position of the telescopic sight over the action and stock. The tilting of the entire action also provided room for the unimpaired loading and ejecting cartridges with the telescopic sight mounted.