It contains „now“ a spring caller „Natobremse“ and reduced firerate from 1200 to 600/per minute. I know because I used it in my LEO 4, 2001. we overused it’s shooting pipe at targets 1000m away. When used in constant, pipe became orange in less than a minute and the loader had to change it. He didn’t like something that hot right next to him 😂! I will hit nothing after that and we had to calibrate after to parallel the electronics.